Device, system, method, and program for automatically calculating design construction business appropriate lead time

Abstract

To provide a device, a system, a method, and a program for automatically calculating design construction business appropriate lead time, which can estimate design construction business lead time with higher accuracy.SOLUTION: A device 10 for automatically calculating design construction business appropriate lead time comprises: a storage unit 12 provided with a standard database 121 for storing standard lead time for each work related to a design construction business and a design construction condition database 122 for storing an added / decreased value of lead time in a work corresponding to a design construction condition; and a calculation unit 111 that adds / decreases a prescribed value to / from the standard lead time in the corresponding work referring to the design construction condition database 122, and calculates appropriate lead time 252a from lead time after the addition / decrease process containing the standard lead time.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to an automatic calculation device for an appropriate lead time for design and construction work, an automatic calculation system for an appropriate lead time for design and construction work, and an automatic calculation method and program for an appropriate lead time for design and construction work. [Background technology]

[0002] Previously, when estimating work for residential design work, each person set a lead time based on the number of buildings, the rough level of difficulty of the design, etc. As a result, there was a discrepancy between the estimate and the actual lead time, which could cause work delays and excessive workloads.

[0003] Therefore, for example, Patent Documents 1 and 2 describe inventions that automatically set the required amount of work and the like based on input data on the size of the house, and create a schedule. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2021-140683 [Patent Document 2] Japanese Patent Application Laid-Open No. 2003-138751 Summary of the Invention [Problem to be solved by the invention]

[0005] However, the inventions of Patent Documents 1 and 2 are for creating a schedule related only to construction work, and are not suitable for design work.

[0006] The present invention has been made in view of the above circumstances, and its object is to make it possible to estimate the lead time of design and construction work with higher accuracy. [Means for solving the problem]

[0007] In order to solve the above problem, the invention of claim 1 is an automatic calculation device 10 for appropriate lead times for design and construction work, which, as shown in Figures 1 to 7, for example, comprises a memory unit 12 having a standard database 121 in which standard lead times for each task related to design and construction work are stored, and a design and construction conditions database 122 in which adjustment values ​​for lead times for tasks corresponding to design conditions and construction conditions are stored, and a calculation unit 111 that refers to the design and construction conditions database 122 based on the acquired design conditions or construction conditions, adds or subtracts a predetermined value to the standard lead time for the corresponding task, and calculates an appropriate lead time 252a from the sum of the lead times after adjustment processing including the standard lead time.

[0008] According to the invention of claim 1, the calculation unit 111 calculates the appropriate lead time 252a based on the standard lead time previously set in the standard database 121 and an adjustment value according to the design conditions or construction conditions previously set in the design and construction conditions database 122. Therefore, the lead time estimate is standardized, and it becomes possible to estimate the lead time for design and construction work with higher accuracy.

[0009] The invention described in claim 2 is, for example, as shown in FIG. 1, an automatic calculation device 10 for appropriate lead times for design and construction work described in claim 1, which is provided with a setting unit 112 that can change the standard lead time in the standard database 121 and / or the adjustment value in the design and construction condition database 122.

[0010] According to the invention of claim 2, the standard lead time in the standard database 121 and / or the adjustment value in the design and construction conditions database 122 can be changed depending on the base where the device is installed. Therefore, flexible operation according to the base where the device for automatically calculating optimum lead time for design and construction work 10 is installed becomes possible.

[0011] The invention described in claim 3 is, for example, as shown in Figures 1 and 6, an automatic calculation device 10 for optimum lead times for design and construction work described in claim 1 or 2, and includes a derivation unit 113 that derives optimum schedules 253a for each task from the optimum lead time 252a calculated by the calculation unit 111 and the acquired construction start date.

[0012] According to the invention of claim 3, the deriving unit 113 derives the appropriate schedule 253a, so that the appropriate start date for each task can be grasped, which makes it easier to create a work plan.

[0013] The invention described in claim 4 is, for example, as shown in Figure 7, an automatic calculation device 10 for optimum lead times for design and construction work described in claim 3, in which the derivation unit 113 derives the difference between the acquired execution date of the design work or construction work and the derived optimum schedule 253a for the work.

[0014] According to the invention described in claim 4, the derivation unit 113 derives the difference between the appropriate schedule 253a and the actual work execution date, i.e., the deviation, so it is possible to grasp whether the current work progress is progressing or lagging behind, which makes it possible to correct the work plan.

[0015] The invention described in claim 5 is, for example, as shown in Figures 1 and 7, an automatic calculation device 10 for optimum lead times for design and construction work described in claim 4, which is equipped with a display control unit 114 that displays the difference derived by the derivation unit 113.

[0016] According to the invention of claim 5, the progress or delay of the current work progress can be visually grasped, which makes it easier to revise the work plan.

[0017] The invention described in claim 6 is, for example, as shown in Figure 1, a system 100 for automatically calculating an appropriate lead time for design and construction work, which includes an automatic calculation device 10 for an appropriate lead time for design and construction work described in claim 1 or 2, and a user terminal 20 that transmits design conditions and construction conditions to the automatic calculation device 10 for an appropriate lead time for design and construction work.

[0018] According to the sixth aspect of the present invention, the lead time for each design and construction work can be estimated via the user terminal 20.

[0019] The invention described in claim 7 is a method for automatically calculating an appropriate lead time for design and construction work in an automatic calculation device 10 for calculating an appropriate lead time for design and construction work, which includes a memory unit 12 having a standard database 121 in which standard lead times for each process related to design and construction work are stored, and a design and construction conditions database 122 in which adjustment values ​​for lead times for work corresponding to design conditions and construction conditions are stored, as shown in Figures 1 to 7, for example, and includes a calculation step S4 in which, based on the acquired design conditions or construction conditions, the design and construction conditions database 122 is referenced, a predetermined value is added or subtracted from the standard lead time for the corresponding work, and an appropriate lead time 252a is calculated from the sum of the lead times after adjustment processing including the standard lead time.

[0020] According to the invention of claim 7, the appropriate lead time 252a is calculated based on the standard lead time previously set in the standard database 121 and an adjustment value according to the design conditions or construction conditions previously set in the design and construction conditions database 122. Therefore, it becomes possible to estimate the lead time of the design and construction work with higher accuracy.

[0021] The invention described in claim 8 is, for example, as shown in Figures 1 to 7, a program that causes a computer of an automatic calculation device 10 for appropriate lead times for design and construction work to function as a calculation unit 111 that refers to the design and construction conditions database 122 based on the acquired design conditions or construction conditions, adds or subtracts a predetermined value to the standard lead time for the corresponding work, and calculates an appropriate lead time 252a from the sum of the lead times after addition or subtraction processing including the standard lead time, by referring to the design and construction conditions database 122 based on the acquired design conditions or construction conditions.

[0022] According to the invention described in claim 8, the computer calculates the appropriate lead time 252a based on the standard lead time previously set in the standard database 121 and an adjustment value according to the design conditions or construction conditions previously set in the design and construction conditions database 122. Therefore, it becomes possible to estimate the lead time of the design and construction work with higher accuracy. [Effects of the Invention]

[0023] According to the present invention, the lead time for design and construction work can be estimated with higher accuracy. [Brief explanation of the drawings]

[0024] [Figure 1] FIG. 1 is a block diagram of a system for automatically calculating an appropriate lead time for design and construction work. [Figure 2] 10 is a flowchart of a process for automatically calculating an appropriate lead time for design work. [Figure 3] FIG. 10 is a diagram illustrating an example of a condition input screen. [Figure 4A] FIG. 10 is a diagram illustrating an example of a standard database. [Figure 4B] FIG. 2 is a diagram showing an example of a design and construction condition database. [Figure 5] FIG. 10 is a diagram illustrating an example of a business optimum lead time display screen. [Figure 6] FIG. 10 is a diagram illustrating an example of a schedule display screen. [Figure 7] FIG. 10 is a diagram showing a modified example of the schedule display screen. DETAILED DESCRIPTION OF THE INVENTION

[0025] Hereinafter, a detailed description will be given of an automatic calculation system for optimum lead times for design and construction work according to an embodiment of the present invention, with reference to the drawings. However, the scope of the invention is not limited to the illustrated examples. In the following description, components having the same functions and configurations are designated by the same reference numerals, and their description will be omitted.

[0026] [Overall configuration of the system for automatically calculating appropriate lead times for design and construction work] Fig. 1 is a diagram showing the overall configuration of a system 100 (hereinafter referred to as the system) for automatically calculating optimum lead times for design and construction work according to the present invention. For example, the system 100 comprises a server 10, which is an automatic calculation device for optimum lead times for design and construction work, and a user terminal 20. The server 10 and the user terminal 20 are connected to each other via a network N.

[0027] The network N may include various communication networks such as telephone networks, optical fibers, mobile communication networks, communication satellite networks, CATV (Community Antenna Television) networks, and other dedicated lines, as well as an internet service provider (i.e., the internet) that connects them. The network N may also be a collective communication network in which various communication networks such as LAN (Local Area Network), WAN (Wide Area Network), WiFi (Wireless Fidelity), Bluetooth (registered trademark), or NFC (Near Field Communication) are connected to each other so that they can communicate with each other. The connection type may be wired, wireless, or a combination of wired and wireless.

[0028] (server) A server 10 is provided for each base to which each user who uses the system 100 belongs. The server 10 is provided with the functions necessary for the system 100. The server 10 of this embodiment includes a control unit 11, a storage unit 12, and a communication unit 13. The various units of the server 10 are connected by a bus 14.

[0029] The server 10 may be provided as a physical device or may be provided in a cloud environment without having a physical device. In addition, if the server 10 is provided as a device, the device may be provided with a display unit and an operation unit so that various processes can be performed near the server 10.

[0030] {Control Unit} The control unit 11 is composed of a CPU (Central Processing Unit), RAM (Random Access Memory), etc. The CPU reads out various programs stored in the storage unit 12, loads them into the RAM, executes various processes according to the loaded programs, and centrally controls the operations of each unit in the server 10.

[0031] In particular, the control unit 11 functions as a calculation unit 111, a setting unit 112, a derivation unit 113, and a display control unit 114 by the CPU executing a program.

[0032] <Calculation section> The calculation unit 111 refers to the design and construction conditions database 122 (described later) and adds or subtracts a predetermined value from the lead time of the corresponding work in accordance with the design conditions or construction conditions acquired from the user terminal 20. The calculation unit 111 then calculates the appropriate lead time 252a (see FIG. 5) for the design work or construction work by adding up the lead times of each work in each process. The details of this process will be described later.

[0033] <Settings Department> The setting unit 112 sets (changes) the standard lead time in the standard database 121 (described later) and the adjustment value in the design and construction conditions database 122 in response to an instruction received from the user terminal 20.

[0034] <Derivation part> The derivation unit 113 derives an appropriate schedule 253a (see FIG. 6) from the appropriate lead time 252a calculated by the calculation unit 111 and the construction start date acquired from the user terminal 20.

[0035] Display control section The display control unit 114 transmits a display control signal to the user terminal 20, causing a display unit 25 (described later) of the user terminal 20 to display a desired image.

[0036] {Storage section} The storage unit 12 includes an HDD (Hard Disk Drive), a non-volatile semiconductor memory, etc. The storage unit 12 stores various programs and various data executed by the control unit 11. Note that at least a part of the various programs may be stored in a ROM (Read Only Memory) of the control unit 11, etc.

[0037] The storage unit 12 also stores a standard database 121 and a design and construction conditions database 122. The standard database 121 stores, for each task, the process to which it belongs and the standard lead time associated with it. The design and construction conditions database 122 stores, for each design condition and construction condition, the task corresponding to that condition, the process to which that task belongs, and an adjustment value for the lead time for that task associated with that condition.

[0038] The standard lead time in the standard database 121 and the adjustment values ​​in the design and construction conditions database 122 may be the standard values ​​of the company that introduced the system 100 in the initial state. However, these values ​​generally differ depending on the base where the system 100 is operated. Therefore, these values ​​may be appropriately set (changed) by the setting unit 112 depending on the base where the system is operated. Of course, these values ​​may also be set from scratch by the setting unit 112.

[0039] {Communications Department} The communication unit 13 is configured with a communication module, etc. The communication unit 13 transmits and receives various signals and various data to and from the user terminal 20 connected via the network N. Furthermore, the information sent from the communication unit 13 to the user terminal 20 can be transmitted in a state where multiple pieces of information are linked together.

[0040] (User device) The user terminal 20 is a terminal device such as a desktop PC that is carried and used by each user. Note that the user terminal 20 may also be a portable information terminal such as a smartphone, a tablet terminal, or a laptop computer (so-called notebook computer, notebook, ultrabook, etc.).

[0041] Each user terminal 20 communicates data with the server 10 using a network N (specifically, the communication line of the user terminal 20, a wireless LAN, etc.). The user terminal 20 includes a control unit 21, a memory unit 22, a communication unit 23, an input unit 24, a display unit 25, etc. The various units of the user terminal 20 are connected by a bus 26.

[0042] {Control Unit} The control unit 21 is a processor (computer) that has a CPU, ROM, RAM, etc., and controls the overall operation of each unit in the user terminal 20. The CPU reads out programs such as apps (application programs) stored in the storage unit 22, expands them into the RAM, and executes the programs to perform various processes.

[0043] {Storage section} The storage unit 22 includes a non-volatile semiconductor memory or the like, and stores programs such as applications, various data, etc. In addition, a web browser or program capable of displaying a condition input screen 251, an appropriate business lead time display screen 252, and a schedule display screen 253 (all of which will be described later) is installed in the user terminal 20.

[0044] {Communications Department} The communication unit 23 is configured by a communication interface, etc. The communication unit 23 transmits and receives data to and from the server 10 via the network N using a predetermined communication protocol.

[0045] {Input section} The input unit 24 receives an operation input from a user and transmits an operation signal corresponding to the operation input to the control unit 21. The input unit 24 includes an input device such as a keyboard, a mouse, or physical buttons.

[0046] {Display section} The display unit 25 includes a display device such as a liquid crystal display. The display unit 25 displays various information screens and the like under the control of the control unit 21. The input unit 24 and the display unit 25 may be integrated into a display device such as a liquid crystal panel and an input device such as a touch panel that is provided over the display screen of the display device.

[0047] [Automatic calculation of appropriate lead time for design work] An example of the operation of the system 100 described above for automatically calculating the appropriate lead time for design work will be described with reference to the flowchart shown in FIG.

[0048] When the design work appropriate lead time automatic calculation process is started, the display control unit 114 transmits a control signal to the user terminal 20 to cause the display unit 25 to display a condition input screen 251 for accepting design conditions (step S1).

[0049] 3 is a diagram showing an example of the condition input screen 251. The condition input screen 251 accepts input of design conditions related to the design work for which an appropriate lead time 252a is to be calculated. For example, as shown in FIG. 3, the condition input screen 251 displays a plurality of radio buttons 251a for accepting input of various design conditions by selection, for example, the contract classification, whether it is a free product or a planned product, the number of floors, whether it has a storehouse or a skip, whether it is a detached house or not, the purpose, the number of households, the length of the wall panels, the floor area of ​​the components, the price per tsubo, the fire resistance classification, whether it is in a snowy region or not, whether demolition is required, whether ground reinforcement is required, and the delivery method.

[0050] The user inputs the design conditions by operating the input unit 24 (step S2). After inputting the design conditions, the user presses the send button 251b to transmit the design conditions to the server 10 (step S3).

[0051] The server 10, which has acquired the design conditions from the user terminal 20, calculates the appropriate lead time 252a for the design work using the calculation unit 111 (step S4). In detail, the calculation unit 111 acquires the standard lead time for each task from the standard database 121. Furthermore, the calculation unit 111 references the design and construction conditions database 122 based on the acquired design conditions, and adds or subtracts a predetermined value from the lead time for the corresponding task among the acquired standard lead times. Then, the lead times for all tasks after the addition or subtraction are summed to calculate the appropriate lead time 252a for the design work.

[0052] 4A and 4B show examples of a portion of the standard database 121 and the design and construction conditions database 122. For example, in step S2, if "Condominium" is selected as the "Contract Classification" among the design conditions, the calculation unit 111 references the corresponding record 122a in the design and construction conditions database 122. Then, in the negotiation process, the calculation unit 111 adds 0.5 to the standard lead time for the task "Hearing," adds 0.3 to the standard lead time for "Presentation Data Creation," and subtracts 0.5 from the standard lead time for "Plan Proposal." Therefore, the appropriate lead time 252a for the negotiation process is 6.3, calculated by (0.5 + 0.5) + 0.5 + (2.0 + 0.3) + (3.0 - 0.5), rather than 0.5 + 0.5 + 2.0 + 3.0 = 6.0.

[0053] After calculating the appropriate lead time 252a, the display control unit 114 displays the appropriate business lead time display screen 252 (step S5). An example of the appropriate business lead time display screen 252 is shown in FIG. 5. As shown in FIG. 5, the appropriate business lead time display screen 252 displays the standard lead time, the adjustment value calculated in the calculation process of step S4, and the appropriate lead time 252a. The appropriate business lead time display screen 252 also has an input field 252b for the planned construction start date and a send button 252c.

[0054] Then, the control unit 11 determines whether or not input of the scheduled construction start date has been accepted (step S6). If input of the scheduled construction start date has not been accepted, the control unit 11 ends the automatic calculation process of the appropriate lead time for design work.

[0055] When the input of the scheduled construction start date is accepted, the derivation unit 113 derives an optimal schedule 253a for each process (step S7). The optimal schedule 253a indicates the deadline by which each process should be completed relative to the input scheduled construction start date. The optimal schedule 253a can be derived by back-calculating the optimal lead time 252a calculated in step S4 in the order of the processes from the acquired scheduled construction start date. After the optimal schedule 253a is derived, the display control unit 114 displays a schedule display screen 253 displaying the derived optimal schedule 253a, as shown in FIG. 6 (step S8). Note that in FIG. 6, the white areas indicate input values, and the black areas indicate calculated values.

[0056] [Summary, etc.] Although the above description has focused on the application of the present invention to design work, the present invention can also be applied to construction work in substantially the same manner.

[0057] According to the system 100 described above, the appropriate lead time 252a is calculated based on a predetermined standard lead time and adjustments according to the design and construction conditions. Therefore, the judgment regarding the lead time estimation is standardized, and the lead time for design and construction work can be estimated with higher accuracy.

[0058] Furthermore, with the system 100 according to this embodiment, design and construction work is reflected in the process with appropriate numerical values, allowing design and construction personnel to work within a reasonable process, thereby creating decent work opportunities (rewarding and humane work). This can contribute to achieving the SDGs (Sustainable Development Goals) (Goal 8).

[0059] In the above example, one server 10 includes the control unit 11 and the storage unit 12, but the present invention is not limited to this. That is, the server 10 is not limited to one device, but may be configured by interconnecting multiple devices.

[0060] Furthermore, in the above example, a configuration in which input is received from the user terminal 20 has been described, but the present invention is not limited to this. The server 10 may be provided with an operation input unit and a display unit, and the user may directly input data.

[0061] In the above, the system 100 is configured by the server 10 and the user terminal 20, but this is not limiting. That is, the system 100 may be configured by a single user terminal 20 that includes a control unit 21 that functions as a calculation unit 111, a setting unit 112, a derivation unit 113, and a display control unit 114, and a storage unit 22 that includes a standard database 121 and a design and construction condition database 122.

[0062] In the above description, the setting unit 112 is capable of changing the standard lead time and the adjustment value, but this is not limiting. In other words, the setting unit 112 may be capable of changing various settings in the design and construction conditions database 122, such as which design conditions and construction conditions are related to the lead time of which work.

[0063] 4B illustrates a configuration in which the design and construction conditions database 122 adds or subtracts a predetermined value from the standard lead time for a corresponding task only when one of the design conditions is selected, in other words, the standard lead time in the standard database 121 is the lead time when the other of the design conditions is selected, but this is not limiting. Also, while FIG. 3 illustrates a case in which there are two design conditions, there may be three or more options. Furthermore, for design and construction conditions related to numerical values ​​such as the price per square meter, the user may input actual values ​​using text boxes or the like, rather than using a drum button for selection.

[0064] In the above example, the calculation unit 111 adds or subtracts an adjustment value to the standard lead time of each job in accordance with one design condition, but the present invention is not limited to this. That is, the calculation unit 111 may be configured to add or subtract an adjustment value when, for example, multiple design or construction conditions satisfy predetermined conditions. Furthermore, multiple design or construction conditions may be set as settings related to the lead time of one job, and when the multiple design or construction conditions are satisfied, only the adjustment value with the largest absolute value may be added or subtracted.

[0065] In the above example, the calculation unit 111 adds or subtracts an adjustment value to or from the standard lead time in accordance with the design conditions, but the present invention is not limited to this. That is, it is sufficient if an adjustment value is added or subtracted from a predetermined standard lead time, and a predetermined coefficient may be multiplied in the calculation process.

[0066] In the above description, the input of only the planned construction start date is accepted in step S6, and the display control unit 114 displays only the optimal schedule 253a for each process on the schedule display screen 253. However, this is not limited to this. For example, when design work or construction work is in progress, the input of the completion date of each process may also be accepted on the optimal work lead time display screen 252, and the derivation unit 113 may derive the difference from the optimal schedule 253a. Then, the display control unit 114 may display the difference on the schedule display screen 253, as shown in FIG. 7.

[0067] 7 shows an example in which the contract date, the completion dates of the plan determination process and the specification determination process, and the scheduled construction start date are entered on the appropriate business lead time display screen 252. That is, in FIG. 7, as in FIG. 6, the blank areas indicate input values, and the black areas indicate calculated values.

[0068] Based on these input values, the display control unit 114 displays the planned schedule 253b together with the optimal schedule 253a on the schedule display screen 253. As described above, the optimal schedule 253a is the planned completion date of each process, calculated by back-calculating the optimal lead time 252a from the input planned construction start date. In contrast, the planned schedule 253b is the planned completion date and lead time of the uncompleted process, calculated from the input completion date of each process and the optimal lead time 252a.

[0069] Specifically, the display control unit 114 displays the lead times "33" and "10" required for the plan determination process and the specification determination process based on the input contract date and the completion dates of the plan determination process and the specification determination process, respectively. Furthermore, the display control unit 114 displays, as the planning schedule 253b, the completion date of the specification determination process and the scheduled completion date of the changed contract process, "October 10th," based on the appropriate lead time 252a for the changed contract process. Furthermore, the display control unit 114 displays, as the planning schedule 253b, the calculated scheduled completion date of the changed contract process and the lead time "31" required for the construction start process based on the input scheduled construction start date.

[0070] After checking the difference between the optimal schedule 253a and the planned schedule 253b, the user can consider, for example, whether the lead time spent on the contract change process can be shortened or whether the scheduled start date for construction can be postponed.

[0071] In this configuration, it is assumed that the input of the process completion date will be received multiple times. Therefore, the input design conditions or construction conditions may be stored in the storage unit 12 and can be called up on the condition input screen 251, allowing transition to the appropriate business lead time display screen 252.

[0072] In addition, although the above example illustrates a configuration in which the display control unit 114 displays only the appropriate lead time 252a on the business appropriate lead time display screen 252, the present invention is not limited to this. That is, the display control unit 114 may display the appropriate man-hours for each task calculated by the calculation unit 111 in the process of calculating the appropriate lead time 252a on the business appropriate lead time display screen 252. As described above, the appropriate lead time 252a is adjusted by an adjustment value for each process, whereas the appropriate man-hours is adjusted by an adjustment value for each task. [Explanation of symbols]

[0073] 100 Automatic calculation system for appropriate lead time for design and construction work 10 Servers (Design and Construction Work Optimal Lead Time Automatic Calculation Device) 11 Control section 111 Calculation Unit 112 Setting section 113 Derivation part 114 Display control unit 12 Storage section 121 Standard Database 122 Design and Construction Conditions Database 20 user terminals 252a Appropriate lead time 253a Appropriate Schedule

Claims

1. A storage unit including a standard database in which standard lead times for each task related to design and construction work are stored, and a design and construction conditions database in which lead time adjustment values ​​for tasks corresponding to design conditions and construction conditions are stored; and a calculation unit that refers to the design and construction conditions database based on the acquired design conditions or construction conditions, adds or subtracts a predetermined value to the standard lead time for the corresponding work, and calculates an appropriate lead time from the sum of the lead times after addition and subtraction processing including the standard lead time.

2. 2. The automatic calculation device for optimum lead times for design and construction work according to claim 1, further comprising a setting unit capable of changing the standard lead times in the standard database and / or the variances in the design and construction condition database.

3. 3. The automatic calculation device for appropriate lead times for design and construction work according to claim 1 or 2, further comprising a derivation unit that derives appropriate schedules for each task from the appropriate lead time calculated by the calculation unit and the acquired construction start date.

4. 4. The design and construction work optimum lead time automatic calculation device according to claim 3, wherein the derivation unit derives a difference between an acquired execution date of the design work or construction work and the derived optimum schedule for the work.

5. The automatic calculation device for optimum lead times for design and construction work according to claim 4, further comprising a display control unit that displays the difference derived by the derivation unit.

6. The design and construction work appropriate lead time automatic calculation device according to claim 1 or 2, A system for automatically calculating optimum lead times for design and construction work, comprising: a user terminal that transmits design conditions and construction conditions to the automatic calculation device for optimum lead times for design and construction work.

7. A method for automatically calculating an appropriate lead time for design and construction work, which is provided with a storage unit including a standard database in which standard lead times for each process related to design work and construction work are stored, and a design and construction condition database in which lead time adjustment values ​​for work corresponding to design conditions and construction conditions are stored, A method for automatically calculating appropriate lead times for design and construction work, comprising a calculation step of referring to the design and construction conditions database based on the acquired design conditions or construction conditions, adding or subtracting a predetermined value to the standard lead time for the corresponding work, and calculating an appropriate lead time from the sum of the lead times after addition and subtraction processing including the standard lead time.

8. A computer of an automatic calculation device for appropriate lead times for design and construction work, the computer having a memory unit including a standard database in which standard lead times for each process related to design and construction work are stored, and a design and construction conditions database in which lead time adjustment values ​​for work corresponding to design conditions and construction conditions are stored, A program that functions as a calculation unit that refers to the design and construction conditions database based on the acquired design conditions or construction conditions, adds or subtracts a specified value to the standard lead time for the corresponding work, and calculates an appropriate lead time from the sum of the lead times after addition and subtraction processing including the standard lead time.

Images