Decision Support System

Abstract

To effectively support a user to make a decision.SOLUTION: In an actual results database 21 of a decision-making support system 100, history data concerning previous actual results of each of such factors as an external factor that is a physical quantity determined from an external element, a driving factor that is a physical quantity adjustable by a user, and a driving outcome factor that is a physical quantity determined according to the external factor and driving factor is recorded. A range designation unit 11 specifies any of the factors as a search object item, and designates a data range of the search object item. A search unit 13 specifies in the actual results database 21 a period during which history data in which the values of the search object item designated by the range designation unit 11 fall within the data range is recorded, and searches the actual results database 21 for values of factors other than the search object item recorded during the period.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a system for assisting a user's decision-making.

Background Art

[0002] In recent years, with the global climate change, the occurrence of local heavy rains has been increasing everywhere, and preventing inland water flooding during heavy rains has become an urgent issue. To prevent inland water flooding, it is effective to utilize rainwater pumping stations that pump rainwater flowing into the sewer and discharge it into rivers etc. However, it is not easy to determine an appropriate pump operation plan for the constantly changing rainfall situation.

[0003] On the other hand, in recent years, the use of artificial intelligence (AI) has spread in various fields, and it has also been proposed to use AI in formulating pump operation plans at rainwater pumping stations. However, the pump operation plans obtained by AI do not always have a 100% correct rate, and depending on the rainfall situation, the operation of the rainwater pumping station may be carried out according to an inappropriate pump operation plan, and as a result, inland water flooding may have a great impact on human lives and property. To surely avoid this, it is necessary for an experienced operator to finally judge whether the pump operation plan obtained by AI is appropriate.

[0004] However, even if an operator is presented with a pump operation plan obtained by AI, it is difficult to finally judge whether it is appropriate only based on that information, and there may be cases where the operator wants to confirm what operations were carried out under similar conditions in the past from the past pump operation records. Also, such problems are not limited to the confirmation of pump operation plans at rainwater pumping stations, but also exist when confirming information in other fields. Furthermore, the same problems exist for pump operation plans and other information obtained by methods other than AI. Therefore, there is a need for a system that easily retrieves information that matches the conditions specified by the user from past performance information and presents the search results to the user to assist the user's decision-making.

[0005] In relation to the above problems, the technology described in Patent Document 1 is known. Patent Document 1 discloses a control system that can accurately monitor a control target from data associated with the control target by designating and extracting a partial data of a trend graph indicating a change in data from the operation content of a user using an icon and displaying the extracted partial data.

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0007] However, the icon described in Patent Document 1 is for designating time (date and time), and not for designating numerical values of data or ranges of numerical values. Therefore, it may not be possible to appropriately retrieve information useful for the user's decision-making from past performance information, and as a result, the user's decision-making may not be effectively supported.

[0008]

Means for Solving the Problems

[0009] For the decision-making support system according to the present invention FirstAn aspect includes a performance database in which history data regarding past performances of each factor, namely, an external factor which is a physical quantity determined by an external factor, an operation factor which is a physical quantity adjustable by a user, and an operation result factor which is a physical quantity determined according to the external factor and the operation factor, is recorded; a range setting unit which designates any one of the external factor, the operation factor, and the operation result factor as a search target item and sets a data range of the search target item; a search unit which specifies, in the performance database, a period during which history data in which the value of the search target item set by the range setting unit satisfies the data range is recorded, and searches the performance database for values of other factors other than the search target item during the period; and a search result display unit which causes a display device to display the values of the other factors searched by the search unit as a search result of the history data. The range setting unit causes the display device to display the set search target item, the data range, and the future predicted value of the search target item. 。 A second aspect of the decision-making support system according to the present invention includes an external factor which is a physical quantity determined by an external factor, an operation factor which is a physical quantity adjustable by a user, and an operation result factor which is a physical quantity determined according to the external factor and the operation factor. A performance database in which historical data regarding past performance of each factor is recorded, a range setting unit that designates any one of the external factor, the operation factor, and the operation result factor as a search target item and sets a data range for the search target item, and a period in which historical data in which the value of the search target item set by the range setting unit satisfies the data range is recorded is specified in the performance database, and for other factors other than the search target item, a search unit that searches for values during the period from the performance database, and a search result display unit that causes the display device to display the values of the other factors searched by the search unit as a search result of the historical data. The range setting unit sets a plurality of search target items. A third aspect of the decision-making support system according to the present invention includes an external factor which is a physical quantity determined by an external factor, an operation factor which is a physical quantity adjustable by a user, and an operation result factor which is a physical quantity determined according to the external factor and the operation factor. A performance database in which historical data regarding past performance of each factor is recorded, a range setting unit that designates any one of the external factor, the operation factor, and the operation result factor as a search target item and sets a data range for the search target item, and a period in which historical data in which the value of the search target item set by the range setting unit satisfies the data range is recorded is specified in the performance database, and for other factors other than the search target item, a search unit that searches for values during the period from the performance database, and a search result display unit that causes the display device to display the values of the other factors searched by the search unit as a search result of the historical data. The search result display unit causes the display device to display a histogram indicating the frequency of the values of the other factors searched by the search unit. A fourth aspect of the decision-making support system according to the present invention includes an external factor which is a physical quantity determined by an external factor, an operation factor which is a physical quantity adjustable by a user, and an operation result factor which is a physical quantity determined according to the external factor and the operation factor. A performance database records historical data regarding past performance of each factor; a range setting unit that designates any one of the external factor, the operation factor, and the operation result factor as a search target item and sets a data range of the search target item; a search unit that identifies, in the performance database, a period during which historical data in which the value of the search target item set by the range setting unit satisfies the data range is recorded, and searches the performance database for values of other factors other than the search target item during the period; and a search result display unit that causes a display device to display, as a search result of the historical data, the values of the other factors searched by the search unit. The search result display unit causes the display device to display a figure in which a frequency difference of the values of the other factors searched by the search unit is expressed by a shade of color or a color difference. The fifth aspect of the decision-making support system according to the present invention includes an external factor which is a physical quantity determined by an external factor, an operation factor which is a physical quantity adjustable by a user, and an operation result factor which is a physical quantity determined according to the external factor and the operation factor. A performance database in which historical data regarding the past performance of each factor is recorded, a range setting unit that designates any one of the external factor, the operation factor, and the operation result factor as a search target item and sets a data range of the search target item, a search unit that specifies, in the performance database, a period during which historical data in which the value of the search target item set by the range setting unit satisfies the data range is recorded, and searches the performance database for values of other factors other than the search target item during the period, a search result display unit that causes a display device to display the values of the other factors searched by the search unit as a search result of the historical data, and an operation input device that detects an operation input of the user. The operation input device includes a pointing device for designating the position of an icon displayed on the display device according to the operation input of the user. The range setting unit causes the display device to display a radar chart having a plurality of axes respectively corresponding to the plurality of search target items, and the range setting unit sets the data range based on the position of the icon designated by the user on each axis of the radar chart using the pointing device. The sixth aspect of the decision-making support system according to the present invention includes an external factor which is a physical quantity determined by external factors, a driving factor which is a physical quantity adjustable by the user, and a driving result factor which is a physical quantity determined according to the external factor and the driving factor. A performance database in which historical data regarding the past performance of each factor is recorded, a range setting unit that designates any one of the external factor, the driving factor, and the driving result factor as a search target item and sets a data range for the search target item, and a period in which historical data in which the value of the search target item set by the range setting unit satisfies the data range is recorded is specified in the performance database, and for other factors other than the search target item, a search unit that searches for values during the period from the performance database, a search result display unit that causes a display device to display the values of the other factors searched by the search unit as a search result of the historical data, and an operation input device that detects an operation input of the user. The operation input device includes a pointing device for designating the position of an icon displayed on the display device according to the operation input of the user. The range setting unit causes the display device to display a trend graph in which the horizontal axis represents the elapsed time and the vertical axis represents the value of the search target item, and shows the time-series change of the value of the search target item. An aspect of the decision-making support system according to the present invention Seventh is a graph showing a time-series change of a future predicted value of an inflow amount into a pump well of a rainwater pumping station, in which the horizontal axis represents future time with respect to a reference time, the vertical axis represents the future predicted value, a trend graph; a plurality of icons respectively displayed within a display frame of the trend graph; history data of the inflow amount that changes in time series within a range defined by the plurality of icons; and history data of a water level of the pump well and a number of operating pump units of the rainwater pumping station corresponding to the history data of the inflow amount, and causes a display device to display a screen including the same.

Advantages of the Invention

[0010] According to the present invention, it is possible to effectively support a user's decision-making.

Brief Description of the Drawings

[0011]

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[0012] Hereinafter, embodiments of the present invention will be described with reference to the drawings. In each of the following embodiments, as a specific example of the decision-making support system according to the present invention, an application example to a system for supporting a user's decision-making regarding a pump operation plan formulated for a rainwater pumping station that discharges rainwater into a river or the like will be described.

[0013] In a rainwater pumping station, the inflow rate of rainwater into the pump well is a physical quantity basically governed by weather (precipitation) and topography, and thus corresponds to an external factor determined by external factors that cannot be freely adjusted by the operator. On the other hand, the water level of the pump well where rainwater flows in and is stored changes according to the inflow rate into the pump well, and is a physical quantity that can be adjusted by the operator by starting or stopping each of the plurality of pumps owned by the rainwater pumping station. That is, the number of operating pumps corresponds to an operating factor that can be adjusted by the operator who is the user, and it can be said that the water level of the pump well obtained as a result of the operation corresponds to an operating result factor determined according to the external factor and the operating factor. Thus, any system that handles physical quantities corresponding to each of the external factor, the operating factor, and the operating result factor can be an application target of the present invention, not limited to rainwater pumping stations.

[0014] For example, when the target is a water purification plant, the external factor can be the raw water quality of the water intake, the operation factor can be the chemical injection amount, and the operation result factor can be the water quality (such as turbidity) within the water purification plant or after water purification. Also, when the target is a sewage treatment plant, the external factor can be the sewage quality flowing in, the operation factor can be the blower air volume or the activated sludge return amount, and the operation result factor can be the water quality (such as the concentration of organic matter, nitrogen, and phosphorus) within the sewage treatment plant or in the discharged water. In addition to this, the present invention can be applied to various systems.

[0015] (Configuration of the Decision Support System) FIG. 1 is a block diagram showing the configuration of a decision support system according to an embodiment of the present invention. The decision support system 100 shown in FIG. 1 is a computer including a control unit 1, a storage unit 2, a memory 3, an operation input device 4, and a display device 5, and these devices are connected to each other via a bus 6.

[0016] The control unit 1 is configured using, for example, a CPU (Central Processing Unit), and performs various processes and calculations for operating the decision support system 100. The control unit 1 realizes each functional block of a range setting unit 11, a search condition logical relationship setting unit 12, a search unit 13, a sorting unit 14, a sorting judgment information input unit 15, and a search result display unit 16 by executing the program stored in the storage unit 2. Details of these functional blocks will be described later. Note that part or all of the functions of the control unit 1 may be realized using a device other than the CPU, for example, a GPU (Graphic Processing Unit), an FPGA (Field Programmable Gate Array), an ASIC (Application Specific Integrated Circuit), or the like.

[0017] However, the control unit 1 does not necessarily need to realize all of the above functional blocks, and depending on the functions of the decision support system 100, only optional functional blocks may be realized in the control unit 1, and other functional blocks may be omitted from the control unit 1. The relationship between the functions of the decision support system 100 and the functional blocks of the control unit 1 will be described in each embodiment below.

[0018] The storage unit 2 is configured using a large-capacity, non-volatile storage device such as a magnetic storage device such as an HDD (Hard Disk Drive) or an SSD (Solid State Drive), and stores programs executed by the control unit 1 and various information used in the processing of the control unit 1. The information stored in the storage unit 2 includes a performance database 21.

[0019] The performance database 21 is a database that records historical data on the past operational performance of the stormwater pumping station. The performance database 21 records historical data on the performance of each of the external factors, operational factors, and operational result factors of the stormwater pumping station, i.e., the amount of stormwater inflow into the pump well, the number of operating pumps, and the water level in the pump well, obtained over a predetermined period in the past, in association with the date and time when the historical data was obtained. This historical data may be input in advance by a user, such as an operator, who operates the decision support system 100, or may be acquired by receiving data transmitted from a control device (not shown) of the stormwater pumping station that is communicatively connected to the decision support system 100. The decision support system 100 can support the user's decision-making regarding the pump operation plan using the performance database 21, which is pre-stored in the storage unit 2 by any method.

[0020] The memory 3 is configured using a high-speed and volatile storage device such as a DRAM (Dynamic Random Access Memory), and is used as a work area when the control unit 1 executes a program.

[0021] The operation input device 4 is a device for detecting a user's operation input, and is configured using, for example, a keyboard, a mouse, and various switches. The display device 5 is a device that presents the processing result of the decision-making support system 100 on a screen for the user, and is configured using, for example, a liquid crystal display, an organic EL display, or the like. Note that other computers, smartphones, etc. that can communicate with the decision-making support system 100 may be used as the operation input device 4 or the display device 5.

[0022] Note that the configuration of the decision-making support system 100 shown in FIG. 1 may be physically constructed on one computer or may be distributed and constructed on a plurality of computers. Further, a logical partition may be configured physically on one or a plurality of computers, and each component of the decision-making support system 100 may be constructed on this logical partition.

[0023] Next, each functional block of the range setting unit 11, the search condition logical relationship setting unit 12, the search unit 13, the screening unit 14, the screening judgment information input unit 15, and the search result display unit 16 in the control unit 1 will be described. In the decision-making support system 100, when the control unit 1 operates as these functional blocks, historical data of past pump operation records that match the search conditions set by the user for the pump operation plan of the rainwater pumping station is retrieved from the performance database 21 and presented to the user. Thereby, it supports the user's decision-making regarding the pump operation plan.

[0024] The range setting unit 11 sets a combination of search target items and data ranges when searching for desired history data from the performance database 21 based on the operation content input by the user using the operation input device 4. In the present embodiment, the range setting unit 11 designates any one of the factors, i.e., the inflow rate into the pump well which is an external factor, the number of pump operating units which is an operation factor, and the water level of the pump well which is an operation result factor, as a search target item, and sets the data range of the search target item. For example, the user selects, from among the inflow rate into the pump well, the number of pump operating units, and the water level of the pump well, an item of history data to be referred to in order to confirm whether the pump operation plan is appropriate for a pump operation plan formulated using AI or the like by a planning device (not shown), and determines the data range of the item and inputs it using the operation input device 4. The range setting unit 11 sets a combination of search target items and data ranges used for searching the performance database 21 according to this information input from the user. Thereby, search conditions for the operation performance data of the past rainwater pumping station can be set.

[0025] When a plurality of search target items are set as search conditions for history data by the range setting unit 11, the search condition logical relationship setting unit 12 sets the logical relationship between the data ranges in the plurality of search target items. For example, assume that a rainwater pumping station has a plurality of pump wells, and the user uses the operation input device 4 to designate the inflow rate into each pump well as a search target item, and designates that the inflow rate into each pump well is within a predetermined data range as a search condition for history data. In this case, the search condition logical relationship setting unit 12 sets a logical product (AND) as the logical relationship between the data ranges designated for the inflow rate conditions of each pump well. In addition, for example, a logical sum (OR), a negative logical product (NAND), a negative logical sum (NOR), an exclusive logical sum (XOR), or a combination thereof can be set by the search condition logical relationship setting unit 12 according to the user's operation input.

[0026] The search unit 13 searches for history data from the performance database 21 based on the search conditions set by the range setting unit 11 and the logical relationship set by the search condition logical relationship setting unit 12.

[0027] The screening unit 14 screens the search results of the history data by the search unit 13. The screening determination information input unit 15 sets, based on the operation content input by the user using the operation input device 4, the screening determination information used when the screening unit 14 screens the search results of the history data, and inputs it to the screening unit 14. The screening unit 14 can extract the history data that meets the desired conditions from the history data retrieved by the search unit 13 based on the screening determination information input from the screening determination information input unit 15.

[0028] The screening determination information input unit 15 can set, for example, the date and time information of the pump non-operation period (maintenance institution, malfunctioning institution, etc.) at the rainwater pump station as the screening determination information. Alternatively, when the evaluation results for the pump operation performance (evaluation categories such as "success / failure / slightly successful / want to reproduce again / never want to repeat again", "excellent / good / fair / poor", "A / B / C", etc., and evaluation scores) are recorded in the performance database 21, these evaluation results can also be used as the screening determination information. The user, who is the operator of the rainwater pump station, can set the screening determination information and screen the search results of the history data by specifying arbitrary conditions using the operation input device 4.

[0029] The search result display unit 16 displays the history data retrieved by the search unit 13 on the display device 5 and presents it to the user. When screening is performed by the screening unit 14, the remaining history data after screening among the history data retrieved by the search unit 13 is displayed on the display device 5. Also, the combination of the search target items and the data range set as the search conditions by the range setting unit 11, the logical relationship set by the search condition logical relationship setting unit 12, etc. may be displayed together with the search results of the history data. Specific screen examples displayed on the display device 5 at this time will be described in the following embodiments.

[0030] Next, specific operation examples of the decision support system 100 will be described with reference to the following embodiments.

[0031] (First embodiment) 2 is a diagram showing the flow of information in a decision support system 100 according to a first embodiment of the present invention. In the first embodiment, an example will be described in which history data is searched for from a performance database 21 using a range setting unit 11, a search unit 13, and a search result display unit 16, and the history data is presented to a user. Note that in this embodiment, the control unit 1 does not necessarily have to include the search condition logical relation setting unit 12, the screening unit 14, and the screening judgment information input unit 15.

[0032] The range setting unit 11 sets a combination of search target items and data ranges based on the user's operation, and passes these settings to the search unit 13 as search range information. The search unit 13 outputs the search range information input from the range setting unit 11 to the performance database 21 and searches the performance database 21. At this time, it converts the format of the search range information as necessary. As a result, from the historical data related to the operational performance of the stormwater pumping station recorded in the performance database 21, historical data that satisfies the data range specified in the search range information for the search target items is extracted.

[0033] The history data extracted from the performance database 21 is transferred from the performance database 21 to the search unit 13 as the search results of the performance database 21. The search unit 13 passes the search results transferred from the performance database 21 to the search result display unit 16. At this time, the format of the search results is converted as necessary.

[0034] The search result display unit 16 generates a display screen for presenting the search results transferred from the search unit 13 to the user, and outputs it to the display device 5 for display.

[0035] For example, one of the needs of an operator at a stormwater pumping station may be to know the past performance values of the pump well water level relative to the amount of rainfall. In this case, in this embodiment, when the operator selects the amount of rainfall using the operation input device 4, the range setting unit 11 in Figure 2 sets the amount of rainfall as a search target item. In this case, the simplest data range to be specified is either the upper limit or the lower limit of the amount of rainfall, or both.

[0036] When the operator specifies an upper limit for rainfall, the search unit 13 searches the past performance database 21 for pump well water levels and dates and times for periods when rainfall was lower than the upper limit, and extracts them as historical data that meet the specified data range. When the operator specifies a lower limit for rainfall, the search unit 13 searches the past performance database 21 for pump well water levels and dates and times for periods when rainfall was higher than the lower limit, and extracts them as historical data that meet the specified data range. When both an upper limit and a lower limit are specified, the search unit 13 searches the past performance database 21 for pump well water levels and dates and times for periods when rainfall was between these limits, and extracts them as historical data that meet the specified data range. The search result display unit 16 then generates a display screen including the pump well water level values obtained as the search results and displays them on the display device 5. If multiple pump well water level values are obtained as the search results, the display screen may be generated in a format that makes it easy for the operator to check the range.

[0037] Next, a specific example of the calculation method of the search unit 13 will be described below. In the following explanation, the performance database 21 stores n records of historical data sets relating to the past operation performance of the stormwater pumping station at predetermined time intervals, and the rainfall amount in the i-th data set is denoted as ri and the pump well water level as Li, where i is an integer ranging from 1 to n.

[0038] The search unit 13 performs format conversion of the set range information input from the range setting unit 11 as necessary, and then searches the past performance database 21 using the set range information. For example, if the upper limit value of the rainfall amount included in the set range information is upperLimit and the lower limit value is lowerLimit, the search unit 13 searches the past performance database 21 for a value of i that satisfies (ri < upperLimit) and (lowerLimit < ri) using an IF-THEN decision statement or the like. Then, the pump well water level Li and date and time values corresponding to the obtained value of i are obtained from the past performance database 21 as search results of the history data.

[0039] As described above, the calculations performed by the search unit 13 are simple, so in this embodiment, the time required to search history data is relatively short, and the response from inputting search conditions to obtaining search results is fast, although this depends on the number of records stored in the performance database 21. Therefore, it is suitable for interactive decision-making support that supports user decision-making by repeatedly sending and receiving user inquiries and responses to those inquiries.

[0040] 3 is a diagram showing another example of the flow of information in the decision support system 100 according to the first embodiment of the present invention. In addition to the information shown in FIG. 2, FIG. 3 further includes an information flow of future predicted values of search target items input to the range setting unit 11. This future predicted value may be determined, for example, according to a numerical value input by the user on the screen of the display device 5 using the operation input device 4, or may be determined automatically without user operation input by reflecting a value calculated by a device or system provided separately from the decision support system 100.

[0041] The range setting unit 11 can display the input future forecast value on the same screen that is displayed on the display device 5 when the user inputs the search target item and data range. In this way, when the user sets the upper and lower limit values of the data range, it is possible to prevent these values from being input incorrectly, and it is also possible to set more appropriate upper and lower limit values.

[0042] FIG. 4 is a diagram showing an example of a display screen according to the first embodiment of the present invention. The display screen shown in FIG. 4 shows an example of a screen displayed on the display device 5 by the range setting unit 11 and the search result display unit 16, and includes a range setting frame 51 and a search result display frame 52. In the display screen of FIG. 4, it is assumed that rainwater flows into the rainwater pump well from two series.

[0043] In the range setting frame 51, for each of the pump well inflow amounts A and B which are search target items, the future predicted value, the constraint maximum value, the constraint minimum value, and the data range under the maximum and minimum conditions of other items are displayed. These display contents are determined by the range setting unit 11 when the user inputs the search target items and the data range.

[0044] The future predicted value represents the future predicted values of the pump well inflow amounts A and B input to the range setting unit 11 in FIG. 3. The constraint maximum value and the constraint minimum value respectively represent the upper limit value and the lower limit value of the data range of the pump well inflow amounts A and B set by the range setting unit 11. By these displays, when the user specifies the constraint maximum value and the constraint minimum value for each of the pump well inflow amount A and the pump well inflow amount B, the possibility of incorrect input can be reduced. Therefore, it becomes possible to set more appropriate values.

[0045] The data ranges under the maximum and minimum conditions of other items represent the interrelationship of the data ranges between each search target item displayed in the range setting unit 11. That is, the data range under the maximum and minimum conditions of other items in the pump well inflow A represents the data range of the pump well inflow A corresponding to the data range of the pump well inflow B, and conversely, the data range under the maximum and minimum conditions of other items in the pump well inflow B represents the data range of the pump well inflow B corresponding to the data range of the pump well inflow A. These pieces of information can be used as a reference when narrowing down the history data set to be searched in the performance database 21 by the logical product (AND) of the data ranges of the pump well inflows A and B respectively. Note that in the initial state, these values are blank, or preferably, the maximum value and the minimum value in all records of the performance database 21 are input.

[0046] For example, let the actual value of the pump well inflow A be flowAi, the actual value of the pump well inflow B be flowBi, and the pump well water level be Li. However, i is an integer taking values in the range of 1 to n. Also, let the upper limit value input by the user as the constraint maximum value of the pump well inflow A be upperLimitA, and the lower limit value input by the user as the constraint minimum value be lowerLimitA. In the screen example of FIG. 4, upperLimitA = 160 [m 3 / min], lowerLimitA = 150 [m 3 / min] is displayed.

[0047] When the upper limit value upperLimitA and the lower limit value lowerLimitA are input by the user in the range setting frame 51, the search unit 13 automatically searches the performance database 21 for the historical data of the pump well inflow rate A that satisfies these constraint values, and extracts the values of i that satisfy (flowAi < upperLimitA) and (lowerLimitA < flowAi). Then, the minimum value and the maximum value are respectively specified among the values of flowBi corresponding to the extracted values of i, and these values are respectively set as the data ranges under the maximum and minimum conditions of other items in the pump well inflow rate B. In the example of FIG. 4, as the data range of the pump well inflow rate B corresponding to the data range of the pump well inflow rate A, the minimum value is 119 [m 3 / min], and the maximum value is 167 [m 3 / min] are displayed.

[0048] When each of the above values is displayed in the range setting frame 51, next, the user inputs an upper limit value upperLimitB corresponding to the maximum constraint value of the pump well inflow rate B and a lower limit value lowerLimitB corresponding to the minimum constraint value of the pump well inflow rate B. At this time, since there is no corresponding data outside the data range under the maximum and minimum conditions of other items in the pump well inflow rate B, the user can understand that it is sufficient to input a numerical value between the minimum value and the maximum value of the displayed data range, that is, between 119 [m 3 / min] and 167 [m 3 / min].

[0049] As described above, when the user inputs the data range of the pump well inflow rate B in the range setting frame 51, the numerical values of the data range under the maximum and minimum conditions of other items (minimum value 119 [m 3 / min] and maximum value 167 [m 3 / min]), and the future predicted value (134 [m 3 / min]) can be used as a reference to determine the input value. This reduces unnecessary searches within data ranges, enabling efficient historical data searches. In the example screen in Figure 4, the user has entered the data range for pump well inflow B with reference to the above values, and the upper limit value upperLimitB, which represents the maximum constraint value, is 140 [m 3 / min], and the lower limit value lowerLimitB representing the minimum constraint value is 130 [m 3 / min] is shown as an example.

[0050] When the user inputs the upper limit value upperLimitB and the lower limit value lowerLimitB in the range setting box 51, the search unit 13 searches the performance database 21 for historical data of the pump well inflow B that satisfies these constraint values, targeting only the value of i extracted for the pump well inflow A, and extracts the value of i that satisfies (flowBi < upperLimitB) and (lowerLimitB < flowBi). Then, the search unit 13 identifies the minimum and maximum values of the flowAi values corresponding to the extracted value of i, and sets these values as the data ranges for the pump well inflow A under the maximum and minimum conditions of the other items. In the example of Figure 4, the data range of the pump well inflow A that corresponds to the data range of the pump well inflow B is set to a minimum value of 110 [m 3 / min], maximum value is 200 [m 3 / min] is displayed.

[0051] In this way, the user can use the range setting frame 51 to search for historical data while mutually checking the range in the performance database 21 where the desired historical data set exists. This prevents the user from setting a data range in which no historical data set exists as the maximum or minimum constraint value, which would result in a wasteful search. Note that while this example describes an example in which pump well inflow A is input first and pump well inflow B is input later, the order can be reversed, and this adjustment can be repeated.

[0052] By following the above search procedure, the value of i that satisfies the following formula (1) can be efficiently narrowed down, and information on the range of the pump well water level Li can be obtained. (flowAi < upperLimitA)AND(lowerLimitA < flowAi)AND (flowBi < upperLimitB)AND(lowerLimitB < flowBi) ··· Formula (1)

[0053] As described above, even when a plurality of search target items are specified by the range setting unit 11, in the data range defined by setting the constraint maximum value and the constraint minimum value, information on the corresponding pump well water level Li and date / time can be obtained. The information thus obtained is displayed in the search result display frame 52 on the display device 5 under the control of the search result display unit 16. At this time, as shown in the screen example of FIG. 4, it is desirable for the search result display unit 16 to simultaneously display the date / time and data value of each extracted data set in the search result display frame 52. Thereby, the user, who is the driver, can easily confirm the date / time when the historical data corresponding to the search conditions was obtained, so it becomes easier to determine whether the historical data is data during normal operation or data during special operations such as inspection or cleaning. Therefore, it is possible to effectively support the user's decision-making regarding the pump operation plan.

[0054] Note that only the numerical value of the pump well water level is displayed in the search result display frame 52 of FIG. 4, but the data values of the pump well inflow rate A and the pump well inflow rate B corresponding to the pump well water level may also be displayed.

[0055] According to the first embodiment of the present invention described above, the following operational effects are achieved.

[0056] (1) The decision-making support system 100 includes a performance database 21, a range setting unit 11, a search unit 13, and a search result display unit 16. The performance database 21 records historical data regarding past performance of each factor, including an external factor (pump well inflow rate), which is a physical quantity determined by external factors, an operation factor (number of pump operating units), which is a physical quantity adjustable by the user, and an operation result factor (pump well water level), which is a physical quantity determined according to the external factor and the operation factor. The range setting unit 11 designates any one of the external factor, the operation factor, and the operation result factor as a search target item and sets the data range of the search target item. The search unit 13 identifies, in the performance database 21, the period during which the historical data in which the value of the search target item set by the range setting unit 11 satisfies the data range is recorded, and searches the performance database 21 for the values of other factors other than the search target item during that period. The search result display unit 16 causes the display device 5 to display the values of the other factors searched by the search unit 13 as the search results of the historical data. In this way, the user's decision-making can be effectively supported.

[0057] (2) The range setting unit 11 causes the display device 5 to display the set search target item and data range, and the future predicted value of the search target item (range setting frame 51). In this way, it is possible to avoid a wasteful search caused by the user specifying an inappropriate search target item or data range.

[0058] (3) The range setting unit 11 can set a plurality of search target items (pump well inflow rate A and pump well inflow rate B). In this way, it becomes possible to more effectively narrow down and search for the target historical data.

[0059] (4) The decision-making support system 100 includes an operation input device 4 that detects the user's operation input. The range setting unit 11 sets the data range based on the user's operation input detected by the operation input device 4. In this way, the user can easily set the data range using the operation input device 4.

[0060] (5) The external factor is the inflow amount to the pump well of the stormwater pumping station, the operation factor is the number of operating pumps at the stormwater pumping station, and the operation result factor is the water level of the pump well. The range setting unit 11 can specify the inflow amount to the pump well as a search target item. In this way, the decision support system 100 can be used to support a user's decision-making regarding a pump operation plan formulated for a stormwater pumping station.

[0061] (Second embodiment) 5 is a diagram showing the flow of information in a decision support system 100 according to a second embodiment of the present invention. In this embodiment, in addition to the range setting unit 11, search unit 13, and search result display unit 16 described in the first embodiment, a search condition logical relationship setting unit 12 is also used to search for history data from a performance database 21 and present the data to a user. In this embodiment, the control unit 1 does not necessarily have to include the screening unit 14 and the screening judgment information input unit 15.

[0062] The search condition logical relationship setting unit 12 sets logical relationships between data ranges for multiple search target items set by the range setting unit 11 based on the user's operation, and passes the set content to the search unit 13 as logical relationship information. The search unit 13 outputs the search range information input from the range setting unit 11 and the logical relationship information input from the search condition logical relationship setting unit 12 to the performance database 21, and searches the performance database 21. At this time, it converts the formats of the search range information and logical relationship information as necessary. As a result, historical data related to the operational performance of stormwater pumping stations recorded in the performance database 21 that satisfies the data ranges specified by the search range information and logical relationship information for the search target items is extracted.

[0063] In the foregoing first embodiment, in the range setting frame 51 on the left side of the screen example shown in FIG. 4, two search target items, namely, the pump well inflow rate A and the pump well inflow rate B, are shown, and the case where these search target items are in a logical product (AND) relationship has been described. However, there are also needs, for example, to search historical data with other logical relationships such as a logical sum (OR). In this embodiment, in response to such needs, an example will be described in which an operator can arbitrarily change and set the logical relationship between search conditions, such as a logical product or a logical sum.

[0064] In this embodiment, in order to realize the above operation, a search condition logical relationship setting unit 12 is added, and any logical relationship can be set using this search condition logical relationship setting unit 12. The logical relationships that can be set by the search condition logical relationship setting unit 12 include not only a logical product (AND) condition and a logical sum (OR) condition, but also other logical relationships, such as a negative logical product (NAND) condition, a negative logical sum (NOR) condition, an exclusive logical sum (XOR), and the like. Also, a plurality of logical relationships may be combined and set.

[0065] For example, when extracting a historical data set to which any one of the data ranges defined by the constraint maximum value and the constraint minimum value set for the pump well inflow rate A and the data ranges defined by the constraint maximum value and the constraint minimum value set for the pump well inflow rate B applies, the historical data that satisfies the search condition of the following formula (2) is searched from the performance database 21. {(flowAi < upperLimitA)AND(lowerLimitA < flowAi)}OR {(flowBi < upperLimitB)AND(lowerLimitB < flowBi)} ··· Formula (2)

[0066] FIG. 6 is a diagram showing an example of a display screen according to the second embodiment of the present invention. The display screen shown in FIG. 6 includes, in addition to the range setting frame 51 and the search result display frame 52 described in the first embodiment, a search condition logical relationship frame 53.

[0067] In FIG. 6, an AND button and an OR button are displayed in the search condition logical relation frame 53. By selecting either of these buttons, the user can set a logical relation corresponding to the selected button. That is, when the AND button is selected, a search for history data that satisfies the search conditions of the aforementioned formula (1) is executed, and when the OR button is selected, a search for history data that satisfies the search conditions of formula (2) is executed. Note that the method of setting the logical relation is not limited to this, and it may be set by other methods, such as writing a mathematical formula. Also, logical relations other than AND and OR may be made settable.

[0068] According to the second embodiment of the present invention described above, the decision-making support system 100 includes a search condition logical relation setting unit 12 that sets the logical relation between the data ranges in a plurality of search target items set by the range setting unit 11. The search unit 13 identifies, in the performance database 21, the period during which the history data that satisfies the logical relation and the data range set for the values of the plurality of search target items set by the range setting unit 11 is recorded. By doing so, it becomes possible to perform the search for the target history data more efficiently.

[0069] (Third Embodiment) FIG. 7 is a diagram showing the flow of information in the decision-making support system 100 according to the third embodiment of the present invention. In the third embodiment, similar to the second embodiment, an example of searching for history data from the performance database 21 using the range setting unit 11, the search condition logical relation setting unit 12, the search unit 13, and the search result display unit 16 and presenting it to the user will be described.

[0070] This embodiment differs from the decision support system 100 according to the second embodiment shown in Fig. 5 in that the search results output from the performance database 21 to the search unit 13 and the search results output from the search unit 13 to the search result display unit 16 each include information on the number of operating pumps, which is an operating factor. This makes it easier for the user, who is an operator, to understand what operations have been performed in the past at the stormwater pumping station, thereby increasing the possibility of achieving more accurate operation.

[0071] Fig. 8 is a diagram showing an example of a display screen according to the third embodiment of the present invention. Similar to the display screen of Fig. 6 described in the second embodiment, the display screen shown in Fig. 8 includes a range setting frame 51, a search result display frame 52, and a search condition logical relationship frame 53. The difference between this embodiment and the second embodiment is that the search condition logical relationship frame 53 includes information on the number of operating pumps, which is an operating factor.

[0072] In Figure 8, the search condition logical relation frame 53 displays the number of operating pumps as 1 to 2 as the data range under the maximum and minimum conditions of other items. In other words, under the search conditions specified by the range setting frame 51 and search condition logical relation frame 53 shown on the left side of Figure 8, there is a track record of one or two stormwater pumps being operated in the past.

[0073] In addition, the range setting frame 51 shows the future predicted value of pump well inflow A of 154 [m 3 / min], and the future predicted value of pump well inflow B is 134 [m 3 / min]. The user can set the data range around these values, i.e., the data range of pump well inflow A, to 150-160 [m 3 / min], and the data range of pump well inflow B is 130 to 140 [m 3 / min], and by searching the performance database 21 for historical data that meets the search conditions, it is possible to determine that the number of pumps in operation was 1 to 2. Therefore, it can be determined that the number of pumps in operation in the future will also be 1 to 2 accordingly.

[0074] As with the screen examples of Figures 4 and 6, it is desirable that the search result display frame 52 displays the date and time and data value of each extracted data set. This allows the user, who is an operator, to easily check the date and time when historical data that meets the search criteria was obtained, making it easier to determine whether the historical data is data from normal operation or data from special operation such as inspection or cleaning. This can effectively support the user's decision-making regarding the pump operation plan.

[0075] Note that the search result display frame 52 in Figure 8 only displays the numerical values for the pump well water level and the number of operating pumps as search results, but it is also possible to display the data values for the corresponding pump well inflow A and pump well inflow B.

[0076] According to the third embodiment of the present invention described above, factors other than the search target items include the number of operating pumps, which is an operation factor. The search result display unit 16 displays the value of the operation factor (the number of operating pumps) for the period identified by the search unit 13 on the display device 5 (search result display frame 52). In this way, values that are considered appropriate as future operation factors can be presented to the user, and support for the user's decision-making can be performed more effectively.

[0077] (Fourth embodiment) Fig. 9 is a diagram showing an example of a display screen according to the fourth embodiment of the present invention. Similar to the display screens shown in Figs. 6 and 8 described in the second and third embodiments, the display screen shown in Fig. 9 includes a range setting frame 51, a search result display frame 52, and a search condition logical relationship frame 53. This embodiment differs from the second and third embodiments in that the range setting frame 51 includes the pump well water level, which is an operation result factor, and the search result display frame 52 includes information on the number of operating pumps, which is an operation factor, but does not include information on the pump well water level.

[0078] The pump well inflow rate shown in the range setting frame 51 is an external factor determined by the rainfall situation and cannot be freely controlled by the operator, who is the user, to a desired value. On the other hand, the pump well water level shown in the range setting frame 51 is an operation result factor obtained as a result of the operation of each rainwater pump. By looking at a display screen like that in Fig. 9, the user, who is the operator, can easily confirm how each pump at the rainwater pump station was operated according to what external factors in the past and what operation results were obtained accordingly.

[0079] As described above, in this embodiment, in the range setting frame 51, it is possible to set an external factor that cannot be directly controlled by the user and a numerical value of the target state after control, respectively. Also, in the search result display frame 52, the number of pump operation units, which is an operation factor, can be displayed as a search result of the history data. Thereby, when a certain target value (here, the range of the pump well water level) is clear as an operation result, it becomes possible to more accurately support the decision-making of the operator.

[0080] Similar to the screen examples in Figs. 4, 6, and 8, it is desirable that the date and time and data values of each extracted data set be displayed in the search result display frame 52. Thereby, the user, who is the operator, can easily confirm the date and time when the history data corresponding to the search conditions was obtained, so it becomes easier to determine whether the history data is data during normal operation or data during special operations such as inspection or cleaning. Therefore, it is possible to effectively support the user's decision-making regarding the pump operation plan.

[0081] Note that only the numerical value of the number of pump operation units is displayed as the search result in the search result display frame 52 of Fig. 9, but the data values of the pump well inflow rate and the pump well water level corresponding to the number of pump operation units may also be displayed.

[0082] According to the fourth embodiment of the present invention described above, the range setting unit 11 specifies each factor including the pump well water level, which is an operation result factor, as a search target item (range setting frame 51). By doing so, when a target value is clearly defined as an operation result, it is possible to more accurately support the decision-making of the user, who is an operator.

[0083] (Fifth embodiment) Fig. 10 is a diagram showing an example of a display screen according to the fifth embodiment of the present invention. Similar to the display screen of Fig. 4 described in the first embodiment, the display screen shown in Fig. 10 includes a range setting frame 51 and a search result display frame 52. The difference between this embodiment and the first embodiment is that the search result display frame 52 includes information on the number of operating pumps, which is an operating factor, in addition to information on the pump well water level, and that these data ranges are displayed by bar graphs 521 and 522.

[0084] Bar graph 521 is a graphic that shows the data range of the pump well water level. The two ends of the bold line in bar graph 521 indicate the maximum (-12.4 m) and minimum (-12.6 m) values of the pump well water level. Similarly, bar graph 522 is a graphic that shows the data range of the number of operating pumps. The two ends of the bold line in bar graph 522 indicate the maximum (2 pumps) and minimum (1 pump) values of the number of operating pumps.

[0085] In the example screen of Fig. 10, the data ranges of the pump well water level and the number of operating pumps are shown using bar graphs 521 and 522, allowing the user to grasp the search results of the historical data at a glance. Therefore, compared to the example screen of Fig. 8 described in the third embodiment, this allows for a more intuitive understanding, reduces misreadings and misconceptions, and is more effective for the appropriate operation of the storm water pumping station.

[0086] According to the fifth embodiment of the present invention described above, the search result display unit 16 causes the display device 5 to display bar graphs 521 and 522, which are graphs showing the ranges of values of factors other than the search target items (pump well water level, number of operating pumps) searched by the search unit 13. By doing so, the user can grasp the search results of the history data at a glance, and it is possible to more effectively support the user's decision-making.

[0087] (Sixth Embodiment) FIG. 11 is a diagram showing an example of a display screen according to the sixth embodiment of the present invention. The display screen shown in FIG. 11 includes a range setting frame 51 and a search result display frame 52, similar to the display screen of FIG. 10 described in the fifth embodiment. The difference between this embodiment and the fifth embodiment is that in the search result display frame 52, the data ranges of the pump well water level and the number of operating pumps are shown by histograms 523 and 524.

[0088] The histogram 523 is a graph showing the data range and frequency distribution of the pump well water level. Similarly, the histogram 524 is a graph showing the data range and frequency distribution of the number of operating pumps. In these histograms, the frequency distribution of each data value is shown by the height of the bar graph.

[0089] In the screen example of FIG. 11, using the histograms 523 and 524, in addition to the data ranges of the pump well water level and the number of operating pumps, the frequency distribution is further shown. As a result, compared with the screen example of FIG. 8 described in the third embodiment and the screen example of FIG. 10 described in the fifth embodiment, the frequency information is added. The points with high frequencies in the histograms 523 and 524 can be judged to have a large number of past achievements and a high credibility. Therefore, the operator, who is the user, can grasp the driving conditions with high certainty from these information, and can operate the rainwater pump station more accurately.

[0090] According to the sixth embodiment of the present invention described above, the search result display unit 16 displays histograms 523, 524 indicating the frequency of values of factors (pump well water level, number of operating pumps) other than the search target items searched for by the search unit 13 on the display device 5. This allows the user to understand the frequency of each data value in the search results of the history data, and more effectively supports the user in making decisions.

[0091] (Seventh embodiment) Fig. 12 is a diagram showing an example of a display screen according to the seventh embodiment of the present invention. Similar to the display screen of Fig. 11 described in the sixth embodiment, the display screen shown in Fig. 12 includes a range setting frame 51 and a search result display frame 52. The difference between this embodiment and the sixth embodiment is that the search result display frame 52 displays the data range and frequency distribution of the pump well water level and the number of operating pumps using grayscale histograms 525, 526.

[0092] The shading histogram 525 is a graphic that shows the data range and frequency distribution of the pump well water level. Similarly, the shading histogram 526 is a graphic that shows the data range and frequency distribution of the number of operating pumps. In these histograms, the frequency distribution of each data value is shown by the shade of color. That is, by displaying areas with high frequency in dark colors and areas with low frequency in light colors, the frequency distribution of the pump well water level and the number of operating pumps in the search results of the historical data is shown.

[0093] In the example screen of Fig. 12, instead of the histograms 523 and 524 in the example screen of Fig. 11 described in the sixth embodiment, gray histograms 525 and 526 are used to show the data range and frequency distribution of the pump well water level and the number of operating pumps. Points with high frequency in the gray histograms 525 and 526 can be judged to have a large number of past performances and a high degree of reliability. Therefore, the user, i.e., the operator, can grasp the operating conditions with high reliability from this information, enabling more accurate operation of the stormwater pumping station.

[0094] According to the seventh embodiment of the present invention described above, the search result display unit 16 causes the display device 5 to display the shade histograms 525 and 526, which are graphs representing the frequency differences of values of other factors (pump well water level, number of operating pumps) other than the search target items searched by the search unit 13, in shades of color. By doing so, the user can grasp the frequency of each data value in the search result of the history data, and the support for the user's decision-making can be carried out more effectively.

[0095] (Eighth Embodiment) FIG. 13 is a diagram showing an example of a display screen according to the eighth embodiment of the present invention. The display screen shown in FIG. 13 is configured to include a range setting frame 51 and a search result display frame 52, similar to the display screen of FIG. 11 described in the sixth embodiment. The difference between this embodiment and the sixth embodiment is that in the search result display frame 52, the data ranges and frequency distributions of the pump well water level and the number of operating pumps are shown by color histograms 527 and 528.

[0096] The color histogram 527 is a graph showing the data range and frequency distribution of the pump well water level. Similarly, the color histogram 528 is a graph showing the data range and frequency distribution of the number of operating pumps. In these histograms, the frequency distributions of each data value are shown by differences in color tones. For example, the location with the highest frequency is set to red, and as the frequency decreases from there, the colors are changed and displayed in the order of orange, yellow, green, blue, indigo, and black, thereby showing the frequency distributions of the pump well water level and the number of operating pumps in the search result of the history data respectively. Note that the above-described color combination is merely an example, and any other combination of colors and shades may be used as long as the locations with high and low frequencies can be intuitively grasped.

[0097] In the screen example of FIG. 13, instead of the histograms 523 and 524 in the screen example of FIG. 11 described in the sixth embodiment, color histograms 527 and 528 are used to show the data ranges and frequency distributions of the pump well water level and the number of operating pumps. In the color histograms 527 and 528, the closer the color is to red, the higher the frequency, and it can be determined that the past actual performance numbers are large and the credibility is high. Therefore, the operator, who is the user, can grasp highly reliable operating conditions from this information and can operate the rainwater pump station more accurately.

[0098] According to the eighth embodiment of the present invention described above, the search result display unit 16 causes the display device 5 to display color histograms 527 and 528, which are graphs representing the difference in frequency of values of other factors (pump well water level, number of operating pumps) other than the search target items searched by the search unit 13 as a difference in color tone. By doing so, the user can grasp the frequency of each data value in the search result of the history data, and the user's decision-making support can be performed more effectively.

[0099] (Ninth Embodiment) FIG. 14 is a diagram showing an example of a display screen according to the ninth embodiment of the present invention. The display screen shown in FIG. 14 includes a range setting frame 51 and a search result display frame 52, similar to the display screen of FIG. 10 described in the fifth embodiment. The difference between this embodiment and the fifth embodiment is that in the range setting frame 51, the user can specify the data ranges of the pump well inflows A and B not by numerical input but by the positions of the icons displayed on the screen.

[0100] The input bar 511 is a figure for inputting the data range to be set for the pump well inflow A and includes icons 5111 and 5112. Similarly, the input bar 512 is a figure for inputting the data range to be set for the pump well inflow B and includes icons 5121 and 5122. The user can move each icon to an arbitrary position by operating a pointing device such as a mouse, which is a part of the operation input device 4, in these input bars.

[0101] In the input bar 511, icons 5111 and 5112 can be used to specify the maximum and minimum constraint values for pump well inflow A, respectively. Historical data for pump well inflow A that satisfies the data range specified between these icons is searched for in the performance database 21. Similarly, in the input bar 512, icons 5121 and 5122 can be used to specify the maximum and minimum constraint values for pump well inflow B, respectively. Historical data for pump well inflow B that satisfies the data range specified between these icons is searched for in the performance database 21.

[0102] In addition, to help the user set data ranges, input bars 511 and 512 display line segments 5113 and 5123, indicating the data ranges under the maximum and minimum conditions of other items. That is, line segment 5113 of input bar 511 represents the data range of pump well inflow A corresponding to the data range of pump well inflow B, and line segment 5123 of input bar 512 represents the data range of pump well inflow B corresponding to the data range of pump well inflow A. Furthermore, in input bar 511, a symbol "●" indicating the future predicted value of pump well inflow A is displayed between icons 5111 and 5112. Similarly, in input bar 512, a symbol "●" indicating the future predicted value of pump well inflow B is displayed between icons 5121 and 5122. These screen displays allow the user, or operator, to easily understand the search condition settings. This reduces misunderstandings and enables accurate setting of search conditions.

[0103] According to the ninth embodiment of the present invention described above, operation input device 4 includes a pointing device for specifying the position of an icon displayed on display device 5 in response to an operation input by the user. Range setting unit 11 sets a data range based on the positions of icons 5111, 5112, 5121, and 5122 specified by the user on the screen of display device 5 using the pointing device. This allows the user to set the data range easily and without error.

[0104] (Embodiment 10) FIG. 15 is a diagram showing an example of a display screen according to the tenth embodiment of the present invention. The display screen shown in FIG. 15 is configured to include a range setting frame 51 and a search result display frame 52, similar to the display screen of FIG. 14 described in the ninth embodiment. In the range setting frame 51, the user can specify the data range of the plurality of pump well inflow amounts according to the positions of the icons displayed on the screen. The difference between this embodiment and the ninth embodiment is that in the range setting frame 51, the data ranges and future predicted values are shown on each axis of a radar chart having a plurality of axes corresponding to each pump well inflow amount specified in the search target item. In the screen example of FIG. 15, five types of pump well inflow amounts A to E are specified as the search target items, and an example is shown in which the data ranges and future predicted values of these pump well inflow amounts are represented by a pentagonal radar chart 513. However, the number of search target items and the shape of the radar chart are not limited to this.

[0105] The radar chart 513 is a figure for inputting the data range to be set for the pump well inflow amounts A to E, and includes pairs of icons corresponding to the pump well inflow amounts A to E, such as icons 5111 and 5112 corresponding to the pump well inflow amount A. The user can move each icon to an arbitrary position in the radar chart 513 by operating a pointing device such as a mouse, which is a part of the operation input device 4.

[0106] In the radar chart 513, on the axis corresponding to the pump well inflow amount A, the constraint maximum value and the constraint minimum value of the pump well inflow amount A can be specified by the icons 5111 and 5112, respectively. The historical data of the pump well inflow amount A that satisfies the data range specified between these icons is retrieved from the performance database 21. Also, in the radar chart 513, a symbol "●" indicating the future predicted value of the pump well inflow amount A is displayed between the icon 5111 and the icon 5112. The same applies to each axis corresponding to the pump well inflow amounts B to E.

[0107] The driver, who is the user, can easily grasp the setting content of the search conditions based on the display content of the radar chart 513. Therefore, misunderstandings and misinterpretations are less likely to occur, and it becomes possible to accurately set the search conditions. In addition, on each axis of the radar chart 513, similar to the line segments 5113 and 5123 in the screen example of FIG. 14 described in the ninth embodiment, the data ranges under the maximum and minimum conditions of other items may be further displayed.

[0108] According to the tenth embodiment of the present invention described above, the range setting unit 11 causes the display device 5 to display a radar chart 513 having a plurality of axes respectively corresponding to a plurality of search target items (pump well inflow amounts A to E). Then, based on the position of the icon specified by the user on each axis of the radar chart 513 using the pointing device, the data range is set. By doing so, even when the user designates a large number of search target items, the user can accurately and easily set the data range for each search target item.

[0109] (Eleventh Embodiment) FIG. 16 is a diagram showing an example of a display screen according to the eleventh embodiment of the present invention. The display screen shown in FIG. 16 is configured to include a range setting frame 51 and a search result display frame 52, similar to the display screen of FIG. 14 described in the ninth embodiment. In the range setting frame 51, the user can specify the data range of the pump well inflow amount according to the position of the icon displayed on the screen. The difference between this embodiment and the ninth embodiment is that in the range setting frame 51, a trend graph 514 showing the time series change of the pump well inflow amount specified as the search target item is displayed, and based on the position of the icon specified by the user within the display frame of this trend graph 514, the data range of the pump well inflow amount is set.

[0110] The trend graph 514 has the elapsed time from a reference time on the horizontal axis and the value of the pump well inflow rate specified for the search target item on the vertical axis, and the time-series change of the pump well inflow rate is shown by these combinations. A plurality of icons are displayed within the display frame of the trend graph 514. Each icon represented by the symbol "▼" of the icon 5141 is an icon for specifying the maximum constraint value of the pump well inflow rate at each elapsed time, and each icon represented by the symbol "▲" of the icon 5142 is an icon for specifying the minimum constraint value of the pump well inflow rate at each elapsed time. The user can move each icon to an arbitrary position in the trend graph 514 by operating a pointing device such as a mouse, which is part of the operation input device 4. At this time, each icon may be movable in each of the up, down, left, and right directions within the display frame of the trend graph 514 without restricting the moving direction of the icon. Alternatively, a restriction may be provided on the moving direction of the icon. For example, it may be movable in the vertical axis (up and down) direction but not movable in the horizontal axis (left and right) direction. In this case, the horizontal position of each icon can be determined, for example, at predetermined intervals.

[0111] In the trend graph 514, a plurality of icons including the icons 5141 and 5142 can be used to specify the maximum constraint value and the minimum constraint value of the pump well inflow rate for each elapsed time, respectively. The history data of the pump well inflow rate that changes in time series within the data range specified between these icons is retrieved from the performance database 21 and shown in the trend graph 514. In the screen example of FIG. 16, the time-series change (broken line in the figure) of the history data of the pump well inflow rate recorded during the period from 11:35 to 12:15 on December 4, 2019, and the time-series change (dashed-dotted line in the figure) of the history data of the pump well inflow rate recorded during the period from 19:02 to 19:42 on December 5, 2019, are shown in the trend graph 514.

[0112] In this way, when the time-series changes of a plurality of historical data are searched within the specified data range, in the trend graph 514, it is preferable that these display forms are different from each other. By doing so, the user can easily distinguish each time-series change from the trend graph 514. In the screen example of FIG. 16, the display form is changed by changing the line type, but other display forms such as color and line thickness may be changed as well.

[0113] In the trend graph 514, for reference when the user sets the data range, the time-series change (solid line in the figure) of the future predicted value of the pump well inflow from that reference time with a current or future point in time as the reference time is also shown. As described above, when restrictions are provided on the moving direction of the icon, the movable range of each icon may be determined based on the time-series change of this future predicted value. For example, the farther the position in the horizontal axis direction is from the reference time within the display frame of the trend graph 514, that is, the longer the elapsed time, the greater the degree of freedom of movement of each icon in the vertical axis direction with respect to the future predicted value. In this way, in a period with a short elapsed time, the movable range of the icon can be restricted because the accuracy of the future predicted value is high, and as the elapsed time becomes longer and the accuracy of the future predicted value decreases, the movable range of the icon can be increased. As a result, it becomes possible to extract a past historical data set with higher accuracy in the immediate vicinity as more important historical data from the performance database 21.

[0114] Note that the time-series change of the historical data corresponding to the data range specified by the position of the icon within the display frame of the trend graph 514 can be searched by performing calculations using a plurality of the above-described formulas (1) and (2) on the time axis. Since this calculation uses simple formulas (1) and (2), it can be performed in a short time. Therefore, when the user specifies search conditions for the decision-making support system 100 of the present embodiment, the search result can be obtained immediately. Therefore, it is suitable for dialog-type decision-making support that supports the user's decision-making by repeating the user's inquiry and the response thereto.

[0115] 16, search result display frame 52 displays trend graph 529 showing time-series changes in pump well water level and trend graph 530 showing time-series changes in the number of operating pumps. Trend graph 529 shows time-series changes in each piece of historical data on pump well water level corresponding to each piece of historical data on pump well inflow displayed in trend graph 514 in range setting frame 51. Trend graph 530 shows time-series changes in each piece of historical data on the number of operating pumps corresponding to each piece of historical data on pump well inflow displayed in trend graph 514 in range setting frame 51. That is, in the example screen of Figure 16, trend graphs 529 and 530 respectively show the time series changes in the historical data of the pump well water level and the number of operating pumps recorded between 11:35 and 12:15 on December 4, 2019 (dashed line in the figure), and the time series changes in the historical data of the pump well water level and the number of operating pumps recorded between 19:02 and 19:42 on December 5, 2019 (dashed line in the figure).

[0116] In the example screen shown in FIG. 16, the period during which the historical data of time-series changes represented by each trend graph in the range setting frame 51 and the search result display frame 52 was recorded is shown below the search result display frame 52. Furthermore, when time-series changes of multiple historical data are shown in each trend graph, a legend indicating the differences in display format is also shown so that these can be distinguished from one another. This allows the user, who is an operator, to easily check the period during which each historical data matching the search criteria was obtained, making it easier to determine whether each historical data is data from normal operation or data from special operation such as inspection or cleaning. This effectively supports the user's decision-making regarding the pump operation plan.

[0117] According to the eleventh embodiment of the present invention described above, the range setting unit 11 displays a trend graph 514 on the display device 5, in which the horizontal axis represents elapsed time and the vertical axis represents the value of the pump well inflow rate, which is the search target item. This allows the time series change of the search target item to be presented to the user in an easy-to-understand manner.

[0118] In addition, the range setting unit 11 sets a data range based on the position of the icon specified by the user within the display frame of the trend graph 514 using a pointing device. By doing so, the user can accurately and easily set the data range to be searched while considering the time-series change of the historical data of the item to be searched.

[0119] Also, in the present embodiment, a plurality of icons used for setting the data range are displayed within the display frame of the trend graph 514. The range setting unit 11 sets the data range based on the respective positions of the plurality of icons specified by the user within the display frame of the trend graph 514 using a pointing device. By doing so, it is possible to easily set a detailed data range.

[0120] Also, in the present embodiment, the icon used for setting the data range may be movable in the vertical axis direction and immovable in the horizontal axis direction within the display frame of the trend graph 514. In this way, it is possible to appropriately set the data range while preventing incorrect input by the user.

[0121] Also, in the present embodiment, the trend graph 514 displays the time-series change of the future predicted value of the pump well inflow volume from a predetermined reference time, and the icon may be configured such that the degree of freedom of movement in the vertical axis direction with respect to the future predicted value increases as the position in the horizontal axis direction within the display frame of the trend graph 514 moves away from the reference time. In this way, it is possible to set the data range so that historical data with higher accuracy in the recent past can be searched as more important historical data.

[0122] (12th Embodiment) FIG. 17 is a diagram showing an example of a display screen according to the twelfth embodiment of the present invention. The display screen shown in FIG. 17 is configured to include a range setting frame 51 and a search result display frame 52, similar to the display screen of FIG. 16 described in the eleventh embodiment. Further, in the range setting frame 51, a trend graph 514 showing the time-series change of the pump well inflow rate is displayed, and in the search result display frame 52, a trend graph 529 showing the time-series change of the pump well water level and a trend graph 530 showing the time-series change of the number of pump operating units are displayed. Furthermore, the user can specify the data range of the pump well inflow rate according to the position of the icon displayed within the display frame of the trend graph 514. The difference between this embodiment and the twelfth embodiment is that in the trend graphs 514, 529, and 530, the respective time-series changes are represented by the shading of the graph.

[0123] When the number of trend graphs obtained as search results is extremely large, if all the trend graphs are drawn, even if the colors, thicknesses, and patterns are different, they will overlap each other, and it will be impossible to distinguish the frequently occurring parts. In such a case, as in this embodiment, it is desirable to convert each obtained trend graph into a probability distribution for each elapsed time and display it as a shaded gradation. In addition, in order to be used as a reference when the user sets the data range, it is desirable that the time-series change of the future predicted value can be simultaneously displayed within the display frame of the trend graph 514.

[0124] In the screen example of FIG. 17, an example of expressing the time-series change of a plurality of history data by the shading of the graph is shown, but other display forms may be used. For example, the most frequently occurring parts may be colored red, then orange, yellow, green, blue, etc., and the user may be able to distinguish the time-series changes of a plurality of history data by changing the color and shading according to the frequency. In addition to this, any display form can be used.

[0125] (The thirteenth embodiment) FIG. 18 is a diagram showing an example of a display screen according to the thirteenth embodiment of the present invention. The display screen shown in FIG. 18 includes a range setting frame 51 and a search result display frame 52, similar to the display screen shown in FIG. 16 described in the eleventh embodiment. The range setting frame 51 displays a trend graph 514 showing time-series changes in pump well inflow, and the search result display frame 52 displays a trend graph 530 showing time-series changes in the number of operating pumps. Furthermore, the user can specify the data range of pump well inflow by positioning an icon displayed within the display frame of the trend graph 514. This embodiment differs from the twelfth embodiment in that a trend graph 529 showing time-series changes in historical data on pump well water levels is displayed in the range setting frame 51 rather than the search result display frame 52.

[0126] The pump well inflow rate, the change over time of which is shown by trend graph 514 in range setting frame 51, is an external factor determined by rainfall, and therefore cannot be controlled to a desired value by the operator. On the other hand, the pump well water level, the change over time of which is shown by trend graph 529 in range setting frame 51, is obtained by the operator controlling the number of operating pumps, which is an operating factor, and the change over time of the number of operating pumps is shown by trend graph 530 in search result display frame 52. That is, in the example screen of FIG. 18 , information on how the user, the operator, operated the pump in the past in order to obtain the change over time of the pump well water level shown in trend graph 529 is shown in trend graph 530 in search result display frame 52.

[0127] In this embodiment, as described above, the values of external factors that the user cannot control and the values of operation result factors that represent the target state after control are displayed as trend graphs 514, 529 in the range setting frame 51. Meanwhile, the search result display frame 52 displays a trend graph 530 that shows the values of operation factors that the user can control. This makes it possible to more accurately support the user's decision-making regarding the pump operation plan when some target value (here, the range of the pump well water level) is clear as the operation result.

[0128] In the case where the number of trend graphs obtained as search results is plural, as shown in the screen example of FIG. 18, the line types may be changed so that they can be distinguished from each other, or they may be made distinguishable from each other by changing other display forms, such as color, line thickness, and graph shading.

[0129] In the screen example of FIG. 18, similar to the screen example of FIG. 16 described in the eleventh embodiment, the period during which the history data of the time-series changes represented by the trend graphs of the range setting frame 51 and the search result display frame 52 is recorded is shown at the lower part of the search result display frame 52. Further, when the time-series changes of a plurality of pieces of history data are shown in each trend graph, a legend representing the difference in the display form is also shown so that these can be distinguished from each other. As a result, the user who is the driver can easily confirm the period during which each piece of history data corresponding to the search conditions was obtained, and thus it becomes easier to determine whether each piece of history data is data during normal operation or data during special operations such as inspection or cleaning. Therefore, it is possible to effectively support the user's decision-making regarding the pump operation plan.

[0130] (The Fourteenth Embodiment) FIG. 19 is a diagram showing the flow of information in the decision-making support system 100 according to the fourteenth embodiment of the present invention. In the present embodiment, an example of retrieving history data from the performance database 21 and presenting it to the user using a screening unit 14 and a screening determination information input unit 15 in addition to the range setting unit 11, the search unit 13, and the search result display unit 16 described in the first embodiment will be described. Note that in the present embodiment, the control unit 1 may not have the search condition logical relationship setting unit 12.

[0131] The search unit 13 outputs the search range information input from the range setting unit 11 to the performance database 21 and performs a search on the performance database 21. At this time, if necessary, the format of the search range information is converted. As a result, among the history data related to the operation results of the rainwater pumping station recorded in the performance database 21, the history data that satisfies the data range specified by the search range information for the search target items is extracted.

[0132] The history data extracted from the performance database 21 is transferred from the performance database 21 to the search unit 13 as the search result of the performance database 21. The search unit 13 delivers the search result transferred from the performance database 21 to the screening unit 14. At this time, if necessary, the format of the search result is converted.

[0133] The screening determination information input unit 15 sets screening determination conditions based on the operation content of the user and delivers the set content to the screening unit 14 as screening determination information. Here, as described above, the screening determination conditions specified by the user based on the date and time information during the pump non-operation period, the evaluation results for the pump operation results, etc. can be set by the screening determination information input unit 15.

[0134] The screening unit 14 screens the search result transferred from the search unit 13 using the screening determination information given from the screening determination information input unit 15 and outputs the result to the search result display unit 1624. The search result display unit 16 generates a display screen for presenting to the user the history data remaining after the screening by the screening unit 14 among the history data searched by the search unit 13, and outputs it to the display device 5 for display.

[0135] FIG. 20 is a diagram showing an example of a display screen according to the 14th embodiment of the present invention. The display screen shown in FIG. 20 includes, in addition to the range setting frame 51 and the search result display frame 52 described in the first embodiment, a further screening determination information frame 54.

[0136] In FIG. 20, in the screening determination information frame 54, input fields for the maximum and minimum values of the driving quality level are displayed. By inputting arbitrary numerical values into these input fields, the user can set the maximum and minimum values of the driving quality level as the screening conditions. For example, assume that in the performance database 21, numerical values representing the evaluation results for the pump operation performance are recorded for each piece of history data. In this case, the screening unit 14 screens the search results by retaining, among the history data retrieved from the performance database 21, those for which the evaluation result of the pump operation performance falls within the range of the minimum and maximum values of the driving quality level specified by the user in the screening determination information frame 54 (in the example of FIG. 20, 80 to 100), and deleting the other history data.

[0137] In the search result display frame 52, the history data of the pump well water level and the number of pump operating units remaining after the screening performed by the screening unit 14 as described above is displayed. After the display of the screening result, the user may change the maximum and minimum values of the driving quality level in the screening determination information frame 54. In this way, it is also possible to interactively change the screening conditions.

[0138] According to the 14th embodiment of the present invention described above, the decision-making support system 100 includes a screening unit 14 that screens the search results by the search unit 13 based on predetermined screening determination conditions. The search result display unit 16 causes the display device 5 to display, as the search result of the history data, the values of other factors (pump well water level, number of pump operating units) other than the search target items searched by the search unit 13, which are the values of the other factors remaining after the screening by the screening unit 14. By doing so, it becomes possible to perform the search for the target history data more efficiently.

[0139] Also, in this embodiment, the decision-making support system 100 includes a screening determination information input unit 15 that sets the screening determination conditions based on the conditions specified by the user. By doing so, the user can specify arbitrary screening determination conditions.

[0140] (Embodiment 15) FIG. 21 is a diagram showing an example of a display screen according to the 15th embodiment of the present invention. The display screen shown in FIG. 21 is configured to include a range setting frame 51 and a search result display frame 52, similar to the display screen of FIG. 16 described in the 11th embodiment. In the range setting frame 51, a trend graph 514 showing the time-series change of the pump well inflow rate is displayed. In the search result display frame 52, a trend graph 529 showing the time-series change of the pump well water level and a trend graph 530 showing the time-series change of the number of pump operating units are displayed. Further, the user can specify the data range of the pump well inflow rate according to the position of the icon displayed within the display frame of the trend graph 514. The difference between this embodiment and the 12th embodiment is that a sifting judgment information frame 54 is further included within the screen. Note that the content of the sifting judgment information frame 54 is the same as that of the screen example of FIG. 20 described in the 14th embodiment.

[0141] In the trend graphs 529 and 530 of the search result display frame 52, among the history data of the pump well water level and the number of pump operating units corresponding to each history data of the pump well inflow rate shown in the trend graph 514 of the range setting frame 51, the time-series changes of the history data of the pump well water level and the number of pump operating units remaining after the sifting performed as described above by the sifting section 14 are respectively shown. That is, in the screen example of FIG. 21, only the time-series changes of the history data of the pump well water level and the number of pump operating units recorded during the period from 11:35 to 12:15 on December 4, 2019 are respectively shown in the graphs 529 and 530. On the other hand, the time-series changes of the history data of the pump well water level and the number of pump operating units recorded during the period from 19:02 to 19:42 on December 5, 2019 are not shown in the graphs 529 and 530 because they were deleted by the sifting.

[0142] Note that the present invention is not limited to the above embodiments and modifications, and can be implemented using any constituent elements without departing from the gist thereof. Also, the respective embodiments and modifications can be arbitrarily combined and implemented.

[0143] The above embodiments and modifications are merely examples, and the present invention is not limited to these contents as long as the features of the invention are not impaired. Also, although various embodiments and modifications have been described above, the present invention is not limited to these contents. Other aspects conceivable within the scope of the technical idea of the present invention are also included in the scope of the present invention.

Explanation of Reference Numerals

[0144] 1... Control unit, 2... Storage unit, 3... Memory, 4... Operation input device, 5... Display device, 6... Bus, 11... Range setting unit, 12... Search condition logical relation setting unit, 13... Search unit, 14... Screening unit, 15... Screening judgment information input unit, 16... Search result display unit, 21... Performance database, 100... Decision-making support system

Claims

1. A performance database that records historical data regarding the past performance of each of an external factor, which is a physical quantity determined by external factors, an operation factor, which is a physical quantity adjustable by a user, and an operation result factor, which is a physical quantity determined according to the external factor and the operation factor; A range setting unit that designates any one of the external factor, the operation factor, and the operation result factor as a search target item and sets a data range for the search target item; A search unit that identifies, in the performance database, a period during which historical data in which the value of the search target item set by the range setting unit satisfies the data range, and searches the performance database for values of other factors other than the search target item during that period; A search result display unit that causes a display device to display the values of the other factors searched by the search unit as a search result of the historical data; and The range setting unit causes the display device to display the set search target item and data range and a future predicted value of the search target item. A decision-making support system.

2. An external factor, which is a physical quantity determined by external factors, an operation factor, which is a physical quantity adjustable by a user, and an operation result factor, which is a physical quantity determined according to the external factor and the operation factor, and a performance database that records historical data regarding the past performance of each of the factors; A range setting unit that designates any one of the external factor, the operation factor, and the operation result factor as a search target item and sets a data range for the search target item; A search unit that identifies, in the performance database, a period during which historical data in which the value of the search target item set by the range setting unit satisfies the data range, and searches the performance database for values of other factors other than the search target item during that period; A search result display unit that causes a display device to display the values of the other factors searched by the search unit as a search result of the historical data; and The range setting unit sets a plurality of the search target items. A decision-making support system.

3. The decision-making support system according to Claim 2, further comprising: A search condition logical relationship setting unit that sets a logical relationship between the data ranges in the plurality of search target items set by the range setting unit. The search unit identifies a period in the performance database during which history data is recorded, in which values of the plurality of search target items set by the range setting unit satisfy the logical relationship and the data range. Decision support systems.

4. 4. A decision support system according to claim 1, further comprising: the other factors include the driving factors; The search result display unit displays the values of the driving factors for the period specified by the search unit on the display device. Decision support systems.

5. 5. The decision support system of claim 4, The range setting unit specifies each factor including the driving result factor as the search target item. Decision support systems.

6. 6. A decision support system according to claim 1, further comprising: The search result display unit displays on the display device a graphic showing the range of values of the other factors searched for by the search unit. Decision support systems.

7. A performance database in which historical data on the past performance of each of the following factors is recorded: external factors, which are physical quantities determined by external factors; driving factors, which are physical quantities that can be adjusted by the user; and driving result factors, which are physical quantities determined in accordance with the external factors and the driving factors; a range setting unit that specifies any one of the external factors, the driving factors, and the driving result factors as a search target item and sets a data range for the search target item; a search unit that identifies a period in the performance database during which history data is recorded in which the value of the search target item satisfies the data range set by the range setting unit, and searches the performance database for values of factors other than the search target item during that period; a search result display unit that displays the values of the other factors searched by the search unit on a display device as search results of the history data, The search result display unit displays, on the display device, a histogram showing the frequency of values of the other factors searched by the search unit. Decision support systems.

8. A performance database in which historical data on the past performance of each of the following factors is recorded: external factors, which are physical quantities determined by external factors; driving factors, which are physical quantities that can be adjusted by the user; and driving result factors, which are physical quantities determined in accordance with the external factors and the driving factors; A range setting unit that designates any one of the external factor, the operation factor, and the operation result factor as a search target item and sets a data range for the search target item; A search unit that identifies, in the performance database, a period during which history data in which the value of the search target item set by the range setting unit satisfies the data range, and searches the performance database for values of other factors other than the search target item during that period; A search result display unit that causes a display device to display the values of the other factors searched by the search unit as a search result of the history data; The search result display unit causes the display device to display a graph representing the frequency difference of the values of the other factors searched by the search unit by the shade or color difference of the color. A decision-making support system.

9. A performance database in which history data regarding past performance of each factor including an external factor which is a physical quantity determined from an external factor, an operation factor which is a physical quantity adjustable by a user, and an operation result factor which is a physical quantity determined according to the external factor and the operation factor; A range setting unit that designates any one of the external factor, the operation factor, and the operation result factor as a search target item and sets a data range for the search target item; A search unit that identifies, in the performance database, a period during which history data in which the value of the search target item set by the range setting unit satisfies the data range, and searches the performance database for values of other factors other than the search target item during that period; A search result display unit that causes a display device to display the values of the other factors searched by the search unit as a search result of the history data; An operation input device that detects an operation input of the user; The operation input device includes a pointing device for designating the position of an icon displayed on the display device according to the operation input of the user; The range setting unit causes the display device to display a radar chart having a plurality of axes respectively corresponding to the plurality of search target items; The range setting unit sets the data range based on the position of the icon designated by the user on each axis of the radar chart using the pointing device; A decision-making support system.

10. A performance database in which historical data on past performance of each of the following factors is recorded: external factors, which are physical quantities determined by external factors; driving factors, which are physical quantities that can be adjusted by the user; and driving result factors, which are physical quantities determined in response to the external factors and the driving factors; a range setting unit that specifies any one of the external factors, the driving factors, and the driving result factors as a search target item and sets a data range for the search target item; a search unit that identifies a period in the performance database during which history data is recorded in which the values of the search target items satisfy the data range set by the range setting unit, and searches the performance database for values of factors other than the search target items during that period; a search result display unit that displays the values of the other factors searched by the search unit on a display device as search results of the history data; an operation input device that detects an operation input by the user, the operation input device includes a pointing device for specifying the position of an icon displayed on the display device in accordance with an operation input by the user; The range setting unit displays, on the display device, a trend graph showing a time series change in the value of the search target item, with the horizontal axis representing elapsed time and the vertical axis representing the value of the search target item. Decision support systems.

11. 11. The decision support system of claim 10, The range setting unit sets the data range based on the position of the icon designated by the user using the pointing device within the display frame of the trend graph. Decision support systems.

12. 12. The decision support system of claim 11, A plurality of the icons are displayed within a display frame of the trend graph, The range setting unit sets the data range based on the positions of the plurality of icons designated by the user within the display frame of the trend graph using the pointing device. Decision support systems.

13. 13. A decision support system according to claim 11 or 12, comprising: The icon is movable along the vertical axis but not along the horizontal axis within the display frame of the trend graph. Decision support systems.

14. A decision support system according to any one of claims 11 to 13, comprising: The trend graph displays a time series change in the future predicted value of the search target item from a predetermined reference time, The icon has a greater degree of freedom of movement along the vertical axis relative to the future predicted value as the icon moves farther away from the reference time along the horizontal axis within the display frame of the trend graph. Decision support systems.

15. A decision support system according to any one of claims 1 to 14, comprising: The external factor is the inflow amount to the pump well of the storm water pumping station, The operation factor is the number of pumps operating at the storm water pumping station, The operational result factor is the water level of the pump well; The range setting unit specifies the inflow volume as the search target item. Decision support systems.

16. 16. A decision support system according to any one of claims 1 to 15, a filtering unit that filters search results by the search unit based on predetermined filtering criteria; The search result display unit displays, on the display device, the values of the other factors that remain after filtering by the filtering unit among the values of the other factors searched by the searching unit as search results of the history data. Decision support systems.

17. 17. A decision support system according to claim 16, comprising: A screening judgment information input unit is provided for setting the screening judgment conditions based on the conditions designated by the user. Decision support systems.

18. A graph showing time series changes in future predicted values of inflow into a pump well of a stormwater pump station, a trend graph in which the horizontal axis represents future time relative to a reference time and the vertical axis represents the future predicted value; a plurality of icons respectively displayed within a display frame of the trend graph; History data of the inflow volume that changes over time within a range defined by the plurality of icons; A screen including the water level of the pump well corresponding to the historical data of the inflow amount and the historical data of the number of operating pumps of the storm water pump station is displayed on a display device. Decision support systems.

Images