Plant operation assistance system

Abstract

The purpose of the present invention is to obtain a plant operation assistance system that can reflect changes of situations of an operator in decisions on the importance levels of procedures and that can more appropriately assist in operation.　A plant situation operation system (100) comprises: a risk calculation unit (126) for calculating a risk (P31) of a failure in addressing an event to be addressed; an operation influence factor decision unit (125) for deciding an operation influence factor (P42) on the basis of a performance situation (P23) and an environment situation (P24) that are determined on the basis of information indicating external characteristics and internal characteristics of the operator; and a procedure importance level decision unit (P51) for, on the basis of a procedure importance index (P41) calculated from the risk (P31) and the operation influence factor (P42), deciding the procedure importance levels (P51) for respective procedures in the case where the procedures are implemented by the operator.

Description

Plant operation support system

[0001] The present application relates to a plant operation support system.

[0002] In recent years, software-based digital monitoring and control panels have been increasingly adopted as operational support systems for large-scale plants, such as those in the power industry, replacing traditional hardware-based analog monitoring and control panels. Digital monitoring and control panels consolidate the interfaces for each function into a graphical interface, allowing operators to perform procedures through this interface, thereby miniaturizing the equipment and reducing the operator's workload. Furthermore, plant operations involve predetermined procedures and their content for dealing with incidents, and operators operate the plant according to these procedures. However, because each procedure has different impacts on the plant, when multiple units are operating simultaneously or when multiple events occur simultaneously, it is necessary to determine which procedure should be prioritized and communicate this to the operators. Note that an "event" here refers to an abnormality or a symptom of an abnormality in the plant, and is an event that requires a response.

[0003] As a method for determining the priority of procedures and presenting them to operators, for example, as shown in Patent Document 1, in plant operation support (operation support), a method can be considered in which response priorities for work instructions (procedures) are determined based on the degree of impact on the surrounding environment, including the operating status of the plant, and the work instructions are notified in the order of work priorities determined based on the response priorities.

[0004] Japanese Patent Application Laid-Open No. 2021-144705

[0005] However, in the technology described in Patent Document 1, although response priorities and work priorities are determined based on the plant situation, such as the degree of impact on the surrounding environment, including the plant's operating status, there is a problem in that changes in the operator's situation over time, such as changes in the operator's performance, are not taken into consideration.

[0006] The present application has been made to solve the above-mentioned problems, and aims to provide a plant operation support system that can reflect changes in the operator's situation in determining the importance of each procedure and provide more appropriate operation support.

[0007] The plant operation support system disclosed in the present application is a plant operation support system that supports plant operation by operators, and includes a plant information acquisition unit that acquires plant information of the plant, a plant status determination unit that determines the plant status based on the plant information, including whether or not an event that requires a response has occurred, an operation information acquisition unit that acquires plant operation information, an operation status determination unit that determines the operation status based on the operation information, including which of one or more procedures included in responding to an event is currently being performed, a performance information acquisition unit that acquires performance information indicating internal characteristics of operators, a performance status determination unit that determines the performance status based on the performance information, and an environmental information acquisition unit that acquires external characteristics of operators. an environmental information acquisition unit that acquires information about the plant, an environmental status determination unit that determines the environmental status based on the environmental information; a risk calculation unit that calculates the risk of failing to respond to an event based on the plant status, the operating status, and predetermined risk information; a procedure key index calculation unit that calculates a procedure key index that is an important index of the procedure based on the risk; an operation influence factor determination unit that determines an operation influence factor of an operator based on the performance status, the environmental status, and predetermined operation influence factor rules; a procedure importance determination unit that determines the procedure importance of a procedure when the procedure is performed by an operator based on the procedure key index, the operation influence factor, and predetermined procedure importance rules; and a procedure information presentation unit that presents procedure information that reflects the procedure importance to the operator.

[0008] According to the plant operation support system disclosed in the present application, changes in the operator's situation can be reflected in the determination of the importance of each procedure, thereby enabling more appropriate operation support to be performed.

[0009] 1 is a functional block diagram showing a plant operation support system according to a first embodiment. FIG. 2 is a diagram showing an example of a hardware configuration for realizing functional units of the plant operation support system according to the first embodiment. FIG. 3 is a flow diagram showing the operation of the plant operation support system according to the first embodiment. FIG. 4 is a diagram showing an example of a procedure display according to the first embodiment. FIG. 5 is a diagram showing an example of a performance status determination according to the first embodiment. FIG. 6 is a diagram showing an example of an environmental status determination according to the first embodiment. FIG. 7 is a diagram showing an example of an operation influence factor rule according to the first embodiment. FIG. 8 is a diagram showing an example of risk information according to the first embodiment. FIG. 9 is a diagram showing an example of a risk calculation according to the first embodiment. FIG. 10 is a diagram showing an example of a risk calculation according to the first embodiment. FIG. 11 is a diagram showing an example of a risk calculation according to the first embodiment. FIG. 12 is a diagram showing an example of a procedure importance rule according to the first embodiment. FIG. 13 is a diagram showing an example of a presentation by a procedure information presentation unit according to the first embodiment. FIG. 14 is a functional block diagram showing a plant operation support system according to a second embodiment. FIG. 15 is a diagram showing an example of a relationship between operation influence factors and operation results according to the second embodiment. FIG. 16 is a diagram showing an example of a modified operation influence factor rule according to the second embodiment. FIG. 17 is a diagram showing an example of a presentation by a procedure information presentation unit according to the second embodiment.

[0010] Embodiment 1. Embodiment 1 will be described with reference to FIGS. 1 to 16. FIG. 1 is a functional block diagram showing a plant operation support system according to Embodiment 1. The plant operation support system 100 supports an operator who operates a monitored plant (not shown), and determines a procedure importance P51 of each procedure based on a monitored plant status P21, an operating status P22 of the monitored plant, a performance status P23 indicating the internal status of the operator, and an environmental status P24 of the environment in which the operator is placed. Note that the monitored plant may be one or more. The monitored plant may be, for example, a power generation plant, and the type of plant is not important.

[0011] The plant operation support system 100 includes a plant information storage unit 101 that stores plant information P11, a plant information acquisition unit 111, and a plant status determination unit 121. The plant operation support system 100 includes an operation information storage unit 102 that stores operation information P12, an operation information acquisition unit 112, and an operation status determination unit 122. The plant operation support system 100 includes a performance information storage unit 103 that stores performance information P13, a performance information acquisition unit 113, and a performance status determination unit 123. The plant operation support system 100 includes an environment information storage unit 104 that stores environment information P14, an environment information acquisition unit 114, and an environment status determination unit 124.

[0012] The plant operation support system 100 also includes a risk calculation unit 126 that calculates a risk P31, a risk information storage unit 106 that stores risk information P91, a procedure importance index calculation unit 127 that calculates a procedure importance index P41, an operation influence factor determination unit 125 that determines an operation influence factor P42, an operation influence factor rule storage unit 105 that stores an operation influence factor rule P92, a procedure importance determination unit 128 that determines a procedure importance P51, and a procedure importance rule storage unit 107 that stores a procedure importance rule P93.

[0013] The plant operation support system 100 also includes a procedure information presentation unit 129 and a procedure importance warning unit 130 .

[0014] The plant information acquisition unit 111 acquires plant information P11 from the plant information storage unit 101 and outputs it to the plant status determination unit 121. The plant status determination unit 121 determines a plant status P21 based on the plant information P11 and outputs the plant status P21 to the risk calculation unit 126. The plant information P11 is information that directly or indirectly indicates the status of the monitored plant, such as measurement data from various instruments, i.e., flow meters, thermometers, pressure gauges, water level gauges, etc., plant parameters, and plant alarm information. In the first embodiment, the presence or absence of an event occurring in the plant is determined based on the plant parameters and alarm information included in the plant information P11. The occurrence of an event is identified using a knowledge base that stores data necessary for event identification, such as the relationship between the cause of the event and the spread of the impact of the event. The plant status determination unit 121 detects the occurrence of event X in the plant based on the acquired plant parameters and alarm information. In other words, the determination of the plant status P21 also serves as the detection of the occurrence of an event that requires action. The plant status P21 includes information indicating whether or not the event X has occurred.

[0015] The operation information acquisition unit 112 acquires operation information P12 from the operation information storage unit 102 and outputs it to the operation status determination unit 122. The operation status determination unit 122 determines the operation status P22 based on the operation information P12 and outputs the operation status P22 to the risk calculation unit 126. The operation information P12 is information that directly or indirectly indicates the current operation status of the monitored plant, such as an operating procedure manual and an operation history by operators. The operation information P12 indicates, for example, the procedure currently being performed by the operator, the success or failure of procedures that have already been performed, and the like, and is displayed, for example, as a procedure display. Details of the procedure display according to the first embodiment will be described later.

[0016] The performance information acquisition unit 113 acquires performance information P13 from the performance information storage unit 103 and outputs it to the performance status determination unit 123. The performance status determination unit 123 determines a performance status P23 based on the performance information P13 and outputs the performance status P23 to the driving influence factor determination unit 125. The performance information P13 is information indicating the internal characteristics of the operator and includes static information such as the operator's current proficiency, experience, and personality, and dynamic information such as the operator's psychological and physiological states during work, including information such as the load status, which is an index of the operator's physical and cognitive load, and the alertness level, which is an index of the operator's physical and cognitive arousal. The static information is recorded in advance. The dynamic information is acquired, for example, by measurement using a wearable device or input by the operator himself. The performance status P23 is expressed, for example, as a three-level evaluation. Details of the determination of the performance status P23 will be described later.

[0017] The environmental information acquisition unit 114 acquires environmental information P14 from the environmental information storage unit 104 and outputs it to the environmental situation determination unit 124. The environmental situation determination unit 124 determines an environmental situation P24 based on the environmental information P14 and outputs the environmental situation P24 to the operation influence factor determination unit 125. The environmental information P14 is information indicating the external characteristics of the operator, and includes information on the operator's current working environment, such as the temperature and humidity of the cab, the brightness of the lighting, and the slack time indicating the time available for the procedure to be performed. The environmental situation P24 indicates the environment in which the operator is placed, for example, using a three-level evaluation. Details of the determination of the environmental situation P24 will be described later.

[0018] The driving influence factor determination unit 125 determines driving influence factors P42 based on the performance status P23, the environmental status P24, and the driving influence factor rules P92 acquired from the performance status determination unit 123, the environmental status determination unit 124, and the driving influence factor rule storage unit 105, respectively. The driving influence factor determination unit 125 outputs the driving influence factors P42 to the procedure importance determination unit 128. The driving influence factors P42 comprehensively indicate the status of the operator. The driving influence factor rules P92 are determined in advance and are represented in, for example, a table format, as described below. The determination of the driving influence factors P42 will be described in detail below.

[0019] The risk calculation unit 126 calculates a risk P31 based on the plant status P21, the operational status P22, and the risk information P91 acquired from the plant status determination unit 121, the operational status determination unit 122, and the risk information storage unit 106, respectively. The risk calculation unit 126 outputs the risk P31 to the procedure key indicator calculation unit 127. The risk P31 indicates the probability of failure in responding to an event that requires a response. The risk information P91 is predetermined risk information, and is, for example, a risk tree including an event tree at the time of the occurrence of event X and the probability of failure or success of each procedure, as described below. The risk calculation unit 126 acquires information about an event that currently requires a response from the plant status P21. As a result, the risk calculation unit 126 selects a corresponding event tree (a risk tree composed of the event tree of the currently occurring event) from the risk information P91. The risk calculation unit 126 also acquires information about the procedure currently being performed from the operational status P22. As a result, the risk calculation unit 126 selects risk information corresponding to the procedure being performed, such as a failure probability, from the risk tree. The calculation of the risk P31 will be described in detail later.

[0020] The procedure importance index calculation unit 127 calculates a procedure importance index P41 based on the risk P31 acquired from the risk calculation unit 126. The procedure importance index calculation unit 127 outputs the procedure importance index P41 to the procedure importance determination unit 128. The procedure importance index P41 is an index indicating the importance of each procedure, and is calculated based on the risk P31. The calculation of the procedure importance index P41 will be described later.

[0021] The procedure importance determination unit 128 determines a procedure importance P51 based on the procedure importance rules P93, the procedure importance index P41, and the operation influence factors P42 acquired from the procedure importance rule storage unit 107, the procedure importance index calculation unit 127, and the operation influence factor determination unit 125, respectively. The procedure importance determination unit 128 outputs the procedure importance P51 to the procedure information presentation unit 129 and the procedure importance warning unit 130. The procedure importance P51 is obtained by adding the operation influence factors P42 based on the operator's situation to the procedure importance index P41 based on the plant's situation in accordance with the procedure importance rules P93, and indicates the importance of each procedure in the same way as the procedure importance index P41. The procedure importance rules P93 are determined in advance and are represented, for example, in a table format as described below.

[0022] The procedure information presenting unit 129 presents the operator with procedure information that reflects the procedure importance P51 based on the procedure importance P51 acquired from the procedure importance determining unit 128.

[0023] The procedure importance warning unit 130 generates a procedure importance warning (not shown) as needed based on the procedure importance P51 acquired from the procedure importance determination unit 128, and outputs the generated procedure importance warning. The procedure importance warning is output to personnel other than the operator operating the monitored plant (such as the operator's supervisor, shift supervisor, other operators in the vicinity, etc.).

[0024] Note that each of the storage units, i.e., the plant information storage unit 101, the operation information storage unit 102, the performance information storage unit 103, the environmental information storage unit 104, the risk information storage unit 106, and the operation influencing factor rule storage unit 105, may be included in the plant operation support system 100, but may be omitted if the corresponding information can be acquired externally. Also, the procedure information presentation unit 129 and the procedure importance warning unit 130 may only generate information to be presented to or to issue a warning to the operator, and the presentation of the information or the output of the warning may be performed by an external output device.

[0025] Next, the hardware configuration will be described. Fig. 2 is a diagram showing an example of a hardware configuration that realizes the functional units of the plant operation support system according to the first embodiment. The plant operation support system 100 includes a processor 1, a storage device including a memory 2 and a hard disk 3, an input device 4 that receives data and signals from the outside, an output device 5 that outputs data and signals to the outside, and a system bus 6 that connects the processor 1, the memory 2, the hard disk 3, the input device 4, and the output device 5. Each functional unit of the plant operation support system 100 shown in Fig. 1 is realized by the processor 1 executing a program stored in the memory 2 or the hard disk 3. Alternatively, each functional unit may be realized by a plurality of processors 1, a plurality of memories 2, and a plurality of hard disks 3 working together.

[0026] The processor 1 is configured, for example, by a CPU (Central Processing Unit), an ASIC (Application Specific Integrated Circuit), a DSP (Digital Signal Processor), an FPGA (Field Programmable Gate Array), etc. The memory 2 is configured by a volatile storage device such as a random access memory. The hard disk 3 is an auxiliary storage device and may be replaced with a non-volatile storage device such as a flash memory. The input device 4 is, for example, a keyboard, a mouse, a touch panel, etc. The output device 5 is, for example, a display device such as a monitor or an audio output device such as a speaker.

[0027] Next, the flow of operations of the plant operation support system in embodiment 1 and details of each operation will be described. Fig. 3 is a flow diagram showing the operations of the plant operation support system in embodiment 1. Assume that an event X that requires a response occurs while two operators, Operator A and Operator B, are operating a monitored plant. Operator A is primarily responsible for various operations and is also responsible for various procedures for responding to Event X. Operator B not only gives instructions to and monitors Operator A, but also supports Operator A by implementing various procedures when it becomes difficult for Operator A to operate the plant alone. Assume also that Operator C is present as a standby personnel.

[0028] First, the plant status P21 is determined (step ST101). The plant information acquisition unit 111 acquires plant information P11 from the plant information storage unit 101 and outputs the acquired plant information P11 to the plant status determination unit 121. The plant status determination unit 121 determines the plant status P21 from the plant information P11 based on predetermined criteria. The plant status determination unit 121 outputs the plant status P21 to the risk calculation unit 126.

[0029] After determining the plant status P21, the operating status P22 is determined (step ST102). The operating information acquisition unit 112 acquires the operating information P12 from the operating information storage unit 102 and outputs the acquired operating information P12 to the operating status determination unit 122. The operating status determination unit 122 determines the operating status P22 from the operating information P12 based on predetermined criteria. The operating status determination unit 122 outputs the operating status P22 to the risk calculation unit 126.

[0030] As described above, the operation information P12 is displayed as a procedure display. FIG. 4 is a diagram showing an example of a procedure display according to the first embodiment. The procedure display 400 includes a header 401 indicating information such as the date and time, the event being handled, and the operator, a procedure flow display 402, and a procedure content display 403. The procedure flow display 402 sequentially displays each procedure (procedures S1 to S5) following the occurrence of event X, including branches based on the results (success or failure) of the preceding procedures. The procedure content display 403 indicates the specific content of each procedure. In the example shown in FIG. 4, the procedure flow display 402 is displayed on the left side of the screen, and the procedure content display 403 is displayed on the right side of the screen. Furthermore, in the procedure display 400, the currently executed procedure is displayed in a format different from the other procedures, such as by highlighting. In the example shown in FIG. 4, only "2-1: Procedure S1" is displayed surrounded by a double line, indicating that the currently executed procedure is procedure S1. Furthermore, as can be seen from the procedure flow display 402, if procedure S1 is successful, the process proceeds to procedure S2, and if it is unsuccessful, a shutdown process is carried out. In the first embodiment, the procedure display 400 is generated based on the operating procedure manual included in the operation information P12 and information on the operation history by the operator. In the first embodiment, the procedure currently being performed is displayed in a format different from the other procedures, but the procedure to be performed next may also be displayed in a format different from the other procedures.

[0031] After determining the driving situation P22, the performance situation P23 is determined (step ST103). The performance information acquisition unit 113 acquires performance information P13 from the performance information storage unit 103 and outputs the acquired performance information P13 to the performance situation determination unit 123. The performance situation determination unit 123 determines the performance situation P23 from the performance information P13 based on predetermined criteria. The performance situation determination unit 123 outputs the performance situation P23 to the driving influencing factor determination unit 125.

[0032] FIG. 5 is a diagram showing an example of performance status determination according to the first embodiment. The performance status determination table 500 includes an operator column 501 indicating each operator, a load status column 502 indicating the current load status of each operator, an alertness column 503 indicating the current alertness level of each operator, and a performance status column 510 indicating the current performance status of each operator. In the first embodiment, the performance status P23 of each operator is determined based on the load status and alertness level included in the performance information P13. As shown in FIG. 5 , the load information and alertness level are each indicated on a three-level scale: “good,” “fair,” and “poor.” The performance status P23 of each operator is determined on a three-level scale: “good,” “fair,” and “poor” as an overall evaluation based on the combination of the load information and alertness level. In the example of FIG. 5 , the performance status P23 of operators A and C is determined to be “good” because the load status and alertness level are “good.” The performance status of operator B is determined to be “fair” because the load status is “good” and the alertness level is “fair.” The performance status determination table 500 may be stored in the performance status determination unit 123 or in another storage unit (not shown).

[0033] After determining the performance status P23, the environmental status P24 is determined (step ST104). The environmental information acquisition unit 114 acquires the environmental information P14 from the environmental information storage unit 104 and outputs the acquired environmental information P14 to the environmental status determination unit 124. The environmental status determination unit 124 determines the environmental status P24 from the environmental information P14 based on predetermined criteria. The environmental status determination unit 124 outputs the environmental status P24 to the driving influence factor determination unit 125.

[0034] FIG. 6 is a diagram illustrating an example of environmental status determination according to the first embodiment. The environmental status determination table 600 includes an operator column 601 indicating each operator, an air temperature column 602 indicating the current air temperature and humidity in the cab where each operator is located, a slack time column 603 indicating the current slack time of each operator, and an environmental status column 610 indicating the current environmental status of each operator. In the first embodiment, the environmental status P24 of each operator is determined based on the air temperature and humidity in the cab and the slack time included in the environmental information P14. The air temperature and the slack time are each indicated on a three-level scale: "good," "fair," and "poor." The environmental status P24 of each operator is determined on a three-level scale: "good," "fair," or "poor" as an overall evaluation based on the combination of the air temperature and the slack time. In the example of FIG. 6 , the air temperature and slack time for operators A and B are "good," so the environmental status P24 is determined to be "good." For operator C, the ambient temperature is "unacceptable" and the slack time is "good", so the environmental condition P24 is determined to be "unacceptable". The environmental condition determination table 600 may be stored in the environmental condition determination unit 124 or in another storage unit (not shown).

[0035] After determining the environmental condition P24, the driving influence factor determination unit 125 determines the driving influence factor P42 from the performance condition P23 and the environmental condition P24 based on the driving influence factor rules P92 (step ST105). The driving influence factor determination unit 125 outputs the driving influence factor P42 to the procedure importance determination unit 128.

[0036] FIG. 7 is a diagram illustrating an example of operation influence factor rules according to the first embodiment. The operation influence factor rules P92 according to the first embodiment include a tabular operation influence factor rule table 700, as shown in FIG. 7 . The operation influence factor rule table 700 includes a performance status column 701 indicating the performance status P23, a first environmental status column 702 indicating the operation influence factor P42 when the environmental status P24 is “good,” a second environmental status column 703 indicating the operation influence factor P42 when the environmental status P24 is “passable,” and a third environmental status column 704 indicating the operation influence factor P42 when the environmental status P24 is “unacceptable.” The operation influence factor determination unit 125 determines a corresponding value as the operation influence factor P42 based on the combination of the performance status P23 and the environmental status P24 of each operator. For example, in the case of Operator A, the performance status P23 is determined to be “good” as shown in FIG. 5 , and the environmental status P24 is determined to be “good” as shown in FIG. 6 . In this case, the value "1" in the first row of the first environmental condition column 702 (corresponding to the performance status "good") is determined as the operation influence factor P42 for operator A. Similarly, the operation influence factor P42 for operator B, whose performance status P23 is "fair" and whose environmental status P24 is "good," is determined as "2." The operation influence factor P42 for operator C, whose performance status P23 is "good" and whose environmental status P24 is "poor," is determined as "3."

[0037] After the operation influence factors P42 are determined, the risk P31 is calculated (step ST106). The risk calculation unit 126 calculates the risk P31 from the plant status P21 and the operation status P22 based on the risk information P91. The risk calculation unit 126 outputs the risk P31 to the procedure importance index calculation unit 127.

[0038] The calculation of risk P31 will now be described. Generally, "risk" is often calculated using the product of the probability of occurrence and the magnitude of the impact, or a function expressed by the probability of occurrence and the magnitude of the impact, but in the calculation of risk P31 according to embodiment 1, for simplicity, it is assumed that the magnitude of the impact of failure of each procedure for dealing with event X is the same, and the probability of occurrence, i.e., the probability of failure of each procedure, is treated as the calculation result as is.

[0039] FIG. 8 is a diagram illustrating an example of risk information according to the first embodiment. The risk tree 800 representing the risk information P91 uses an event tree 801 to represent the occurrence of event X, the implementation of each procedure (procedures S1 to S5) for responding to event X, and the final result (whether the response to event X was successful or unsuccessful), along with the failure probability of each procedure. The failure probability of each procedure includes a failure probability 8021 for procedure S1, a failure probability 8022 for procedure S2, a failure probability 8023 for procedure S3, a failure probability 8024 for procedure S4, and a failure probability 8025 for procedure S5. From left to right, the event tree 801 illustrates the results of the implementation of each procedure from the occurrence of event X. If a procedure is successful, the process proceeds to the upper branch, and if it fails, the process proceeds to the lower branch. The final result of the response to event X is indicated as "success" or "failure." For each branch in the event tree 801, the numerical value written in the lower branch represents the failure probability 802 of that procedure. The failure probability 802 is expressed in exponential form. That is, "E-6" indicates 10 to the power of -6, and 3E-6 = 3.0 × 10 －６ Note that the failure probability 8021, the failure probability 8022, the failure probability 8023, the failure probability 8024, and the failure probability 8025 fluctuate under the influence of the plant status P21 and the operation status P22, and therefore the values ​​after the fluctuations are used in the calculation of the actual risk P31, but for the sake of explanation, it is assumed in the following explanation that there is no fluctuation in the failure probability of each procedure.

[0040] FIG. 9 is a diagram showing an example of risk calculation according to the first embodiment. Here, calculation of risk P31 in the event of the occurrence of event X will be specifically described using FIG. 9 . As described above, in the first embodiment, risk P31 is assumed to be equal to the failure probability. Risk tree 900 is obtained by adding the calculation results of risk P31 to risk tree 800. There are three cases in which failure in dealing with event X occurs: a first case in which step S1 fails; a second case in which step S1 is successful, step S2 fails, and then step S5 fails; and a third case in which steps S1 and S2 are successful, step S3 fails, and then step S4 fails. Therefore, the probability of occurrence of the first case is set as failure probability 9031, the probability of occurrence of the second case as failure probability 9032, and the probability of occurrence of the third case as failure probability 9033, and the total probability of occurrence of the three cases is set as total failure probability 903. Each case will be described below. The success probability in each step is exactly 1-(3E-6), but the failure probability is 3E-6, which is sufficiently small, so the success probability is approximated to 1.

[0041] (First Case: Procedure S1 Fails) Since the failure probability 8021 of procedure S1 is 3E-6, the failure probability 9031 in the first case is 3E-6.

[0042] (Second case: procedure S1 succeeds, procedure S2 fails, procedure S5 fails) The success probability of procedure S1 is approximately 1, the failure probability 8022 of procedure S2 is 3E-6, and the failure probability 8025 of procedure S5 is 3E-6, so the failure probability 9032 for the second case is 1 x 3E-6 x 3E-6 = 9E-12.

[0043] (Third case: procedure S1 succeeds, procedure S2 succeeds, procedure S3 fails, procedure S4 fails) The success probability of procedure S1 is approximately 1, the success probability of procedure S2 is approximately 1, the failure probability 8023 of procedure S3 is 3E-6, and the failure probability 8024 of procedure S4 is 3E-6, so the failure probability 9033 for the third case is 1 x 1 x 3E-6 x 3E-6 = 9E-12.

[0044] (Total Failure Probability When Event X Occurs) The total failure probability 903 when event X occurs is the sum of the failure probabilities for the above three cases, and is therefore 3E-6 + 3E-6 + 9E-12 = 3.00002E-6. The total failure probability 903 is the calculation result of the risk P31 in embodiment 1.

[0045] After calculating the risk P31, the procedure importance index P41 is calculated (step ST107). The procedure importance index calculation unit 127 calculates the procedure importance index P41 for each procedure based on the risk P31. The procedure importance index calculation unit 127 outputs the procedure importance index P41 to the procedure importance determination unit 128.

[0046] The procedure importance index P41 in the first embodiment is an index that indicates the relative importance of a target procedure among all the procedures, and a procedure with a large procedure importance index P41 indicates that the failure of the procedure will have a large impact on the whole. In the first embodiment, the procedure importance index P41 is calculated using the following formula (1): procedure importance index=total failure probability when target procedure fails / total failure probability (1) In other words, the procedure importance index P41 is calculated by comparing the total failure probability calculated without specifying any conditions with the total failure probability calculated under the condition that the target procedure will fail.

[0047] Here, the calculation of the procedure importance index P41 for procedure S1 will be specifically described using the example of risk calculation in Fig. 10. Fig. 10 is a diagram showing an example of risk calculation according to the first embodiment, and shows an example of risk calculation assuming that procedure S1 will always fail. Therefore, in the risk tree 1000, the failure probability 10021 for procedure S1 is 1. Even in this case, the occurrence probabilities of the three cases in which handling of event X fails and the total failure probability are calculated.

[0048] (First Case: Procedure S1 Failure) As described above, it is assumed that procedure S1 will always fail, and the failure probability 10021 of procedure S1 is set to 1. Therefore, the failure probability 10031 in the first case is "1".

[0049] (Second case: Step S1 succeeds, step S2 fails, step S5 fails) Step S1 always fails, so its success probability is 0. Therefore, the failure probability 10032 in the second case is also "0".

[0050] (Third case: step S1 succeeds, step S2 succeeds, step S3 fails, step S4 fails) Step S1 always fails, so its success probability is 0. Therefore, the failure probability 10033 of the third case is also "0".

[0051] (Total Failure Probability When Event X Occurs) The total failure probability 1003 when event X occurs is the sum of the failure probabilities in the above three cases, and is therefore 1+0+0=1.

[0052] (Procedure importance index of procedure S1) When procedure S1 fails, the total failure probability is 1003, and the total failure probability is 9003. Therefore, the procedure importance index P41 of procedure S1 is calculated from formula (1) as follows: Procedure importance index = 1 / 3.00002E-6 = 333331.

[0053] Next, the calculation of the procedure importance index P41 for procedure S2 will be specifically described using the risk calculation example in Figure 11. Figure 11 is a diagram showing an example of risk calculation according to the first embodiment, and shows an example of risk calculation assuming that procedure S2 will always fail. Therefore, in the risk tree 1100, the failure probability 11022 for procedure S2 is 1. Even in this case, the occurrence probabilities of the three cases in which response to event X fails and the total failure probability are calculated.

[0054] (First Case: Procedure S1 Fails) Since the failure probability 8021 of procedure S1 is 3E-6, the failure probability 9031 in the first case is 3E-6.

[0055] (Second case: Procedure S1 succeeds, procedure S2 fails, procedure S5 fails) The success probability of procedure S1 is approximately 1, the failure probability 11022 of procedure S2 is 1, and the failure probability 8025 of procedure S5 is 3E-6, so the failure probability 11032 for the second case is 3E-6 x 1 x 3E-6 = 9E-12.

[0056] (Third case: step S1 succeeds, step S2 succeeds, step S3 fails, step S4 fails) Step S2 always fails, so its success probability is 0. Therefore, the failure probability 11033 for the third case is also "0".

[0057] (Total Failure Probability When Event X Occurs) The total failure probability 1103 when event X occurs is the sum of the failure probabilities in the above three cases, and is therefore 3E-6+3E-6+0=6E-6.

[0058] (Procedure importance index of procedure S2) When procedure S2 fails, the total failure probability is 1103, and the total failure probability is 9003. Therefore, from formula (1), the procedure importance index P41 of procedure S2 is calculated as follows: Procedure importance index=6E-6 / 3.00002E-6=1.99999.

[0059] Similarly to the above, the procedure importance index P41 for procedures S3, S4, and S5 can be calculated as follows: (Procedure importance index for procedure S3) Procedure importance index = 6.00001E-6 / 3.00002E-6 = 1.99999 (Procedure importance index for procedure S4) Procedure importance index = 6.00001E-6 / 3.00002E-6 = 1.99999 (Procedure importance index for procedure S5) Procedure importance index = 6.00001E-6 / 3.00002E-6 = 1.99999

[0060] After calculating the procedure importance index P41, the procedure importance determination unit 128 determines the procedure importance P51 (step ST108). The procedure importance determination unit 128 determines the procedure importance P51 based on the procedure importance rule P93, the procedure importance index P41, and the driving influence factor P42. The procedure importance determination unit 128 outputs the procedure importance P51 to the procedure information presentation unit 129 and the procedure importance warning unit 130.

[0061] FIG. 12 is a diagram showing an example of a procedure importance rule according to the first embodiment. The procedure importance rule P93 according to the first embodiment includes a procedure importance rule table 1200 in tabular form, as shown in FIG. 12. The procedure importance rule table 1200 includes a procedure importance determination column 1201 indicating the determination conditions for the procedure importance P51 and a procedure importance column 1202 indicating the procedure importance P51. In the first embodiment, the procedure importance P51 is determined based on the product of the procedure importance index P41 and the operation influence factor P42. Therefore, the procedure importance determination column 1201 indicates the range of the product of the procedure importance index P41 and the operation influence factor P42, and the procedure importance column 1202 indicates the procedure importance P51 according to the product of the procedure importance index P41 and the operation influence factor P42. As described above, the procedure importance index P41 of procedure S1 was 333331, and the operation influence factor P42 of operator A performing procedure S1 was 1. For this reason, the product of the procedure importance index P41 and the operation influence factor P42 when operator A performs procedure S1 is 333331×1=333331, which is greater than 20,000, so the procedure importance P51 when operator A performs procedure S1 is determined to be "high." Similarly, the product of the procedure importance index P41 and the operation influence factor P42 when operator A performs procedures S2, S3, S4, and S5 is 1.99999×1=1.99999, which is less than 200, so the procedure importance P51 when operator A performs procedures S2, S3, S4, and S5 is determined to be "low."

[0062] After determining the procedure importance P51, the procedure information presenting unit 129 presents the procedure information reflecting the procedure importance P51 to the operator (step ST109). The procedure information presenting unit 129 acquires the procedure importance P51 from the procedure importance determining unit 128 and presents the procedure information reflecting the procedure importance P51 to the operator.

[0063] 13 is a diagram showing a presentation example of the procedure information presentation unit according to the first embodiment. The procedure display 1300 presented by the procedure information presentation unit 129 has the same basic configuration as the procedure display 400, and includes a header 1301 indicating information such as the date and time, the event being handled, and the operator, a procedure flow display 1302, and a procedure content display 1303. Meanwhile, the procedure display 1300 reflects the procedure importance P51, and displays each procedure in a display format according to the procedure importance P51, for example, by using different colors. In the example shown in FIG. 13 , procedure S1 ("2-1: Procedure S1"), whose procedure importance P51 is "high," is displayed in white, and procedures S2, S3, S4, and S5, whose procedure importance P51 is "low," are displayed in black.

[0064] Furthermore, a procedure importance warning is output based on the procedure importance P51 (step ST110). The procedure importance warning unit 130 acquires the procedure importance P51 from the procedure importance determination unit 128, generates a procedure importance warning as necessary, and outputs the generated procedure importance warning. In the first embodiment, for example, an alarm sound is sounded to warn people other than the operator who is currently operating the plant. The currently performed procedure (or the procedure to be performed next) is procedure S1, and the procedure importance P51 when performed by operator A is "high." Therefore, an alarm sound is sounded to alert nearby personnel other than the operator, such as the shift supervisor.

[0065] 3 is an example, and the present invention is not limited to this. For example, the order of the various determinations may be reversed, such as by switching the order of step ST101 and step ST102 and determining the operating status before determining the plant status.

[0066] The operation shown in FIG. 3, that is, steps ST101 to ST110, is performed each time a procedure is completed, and the procedure importance P51 is determined and procedure information is presented each time a procedure is performed.

[0067] The calculation of the risk P31 and the procedure key index P41 will be described assuming that procedure S1 is successful and the process proceeds to procedure S2. If procedure S1 is successful, operator A will perform procedure S2. Here, it is assumed that operator A's performance status P23 when procedure S2 is performed has changed since procedure S1 was performed. Specifically, it is assumed that operator A's workload status has decreased from "good" to "fair" from the state shown in FIG. 5. It is assumed that other conditions remain unchanged. FIG. 14 is a diagram showing an example of risk calculation according to the first embodiment, and is a diagram explaining risk calculation after procedure S1 is successful. Since procedure S1 will not fail, in the risk tree 1400, the failure probability 14021 of procedure S1 is "0." Even in this case, the occurrence probability and total failure probability of each case in which the response to event X fails are calculated. However, since this is risk calculation when procedure S2 is performed, it is sufficient to consider procedures after S2. Therefore, there are two cases in which the response to event X fails: a fourth case in which step S2 fails and then step S5 fails, and a fifth case in which step S2 succeeds, step S3 fails, and then step S4 fails.

[0068] (Fourth Case: Step S2 Fails, Step S5 Fails) Since the failure probability 8022 of step S2 is 3E-6 and the failure probability 8025 of step S5 is 3E-6, the failure probability 14032 of the fourth case is 3E-6×3E-6=9E-12.

[0069] (Fifth case: procedure S2 succeeds, procedure S3 fails, procedure S4 fails) The success probability of procedure S2 is approximately 1, the failure probability 8023 of procedure S3 is 3E-6, and the failure probability 8024 of procedure S4 is 3E-6, so the failure probability 14033 for the fifth case is 1 x 3E-6 x 3E-6 = 9E-12.

[0070] (Total Failure Probability When Event X Occurs) The total failure probability 1403 when event X occurs is the sum of the failure probabilities in the above two cases, and is therefore 9E-12+9E-12=1.8E-11.

[0071] Further, although detailed calculations are similar and therefore omitted, the total failure probability and procedure importance index P41 when each procedure fails are as follows:

[0072] (Total failure probability when procedure S2 fails) Since the failure probability of the fourth case is 3E-6 and the failure probability of the fifth case is "0", the total failure probability when procedure S2 fails is 3E-6 + 0 = 3E-6. From the total failure probability when event X occurs and the total failure probability when procedure S2 fails, the procedure key index P41 of procedure S2 is calculated from formula (1) as follows: (Procedure key index of procedure S2) Procedure key index = 3E-6 / 1.8E-11 = 166667

[0073] (Total failure probability when procedure S3 fails) Since the failure probability of the fourth case is 9E-12 and the failure probability of the fifth case is 3E-6, the total failure probability when procedure S3 fails is 9E-12 + 3E-6 = 3E-6. From the total failure probability when event X occurs and the total failure probability when procedure S3 fails, the procedure key index P41 of procedure S3 is calculated from formula (1) as follows: (Procedure key index of procedure S3) Procedure key index = 3E-6 / 1.8E-11 = 166667

[0074] (Total failure probability when procedure S4 fails) Since the failure probability of the fourth case is 9E-12 and the failure probability of the fifth case is 3E-6, the total failure probability when procedure S4 fails is 9E-12 + 3E-6 = 3E-6. From the total failure probability when event X occurs and the total failure probability when procedure S4 fails, the procedure key index P41 of procedure S4 is calculated from formula (1) as follows: (Procedure key index of procedure S4) Procedure key index = 3E-6 / 1.8E-11 = 166667

[0075] Since the failure probability of the fourth case is 3E-6 and the failure probability of the fifth case is 9E-12, the total failure probability when procedure S5 fails is 3E-6 + 9E-12 = 3E-6. From the total failure probability when event X occurs and the total failure probability when procedure S5 fails, the procedure key index P41 of procedure S5 is calculated from formula (1) as follows: (Procedure key index of procedure S5) Procedure key index = 3E-6 / 1.8E-11 = 166667

[0076] 15 is a diagram showing an example of performance status determination according to the first embodiment, illustrating performance status determination when procedure S2 is performed. The performance status determination table 1500 is basically the same as the performance status determination table 500, except that, as described above, the workload of operator A has dropped from "good" to "fair" when procedure S2 is performed. Therefore, the workload of operator A is marked "fair" in the workload status column 1502. As a result, the performance status P23 of operator A is determined to be "fair" in the performance status column 1510. In this case, the operation influence factor P42 of operator A is set to "2" according to the operation influence factor rules shown in FIG. 7.

[0077] As described above, the procedure importance index P41 of each procedure when procedure S2 is performed is 166667, and the operation influence factor P42 of operator A is "2," so the product of the procedure importance index P41 and the operation influence factor P42 is 333334. Therefore, from the example of the procedure importance rules shown in Fig. 12, the procedure importance P51 when operator A performs each procedure when procedure S2 is performed is determined to be "high."

[0078] 16 is a diagram showing an example of presentation by the procedure information presentation unit according to the first embodiment, showing an example of presentation when procedure S2 is being performed. Procedure display 1600 has the same basic configuration as procedure display 400, and includes a header 1601 showing information such as the date and time, the event being handled, and the operator, a procedure flow display 1602, and a procedure content display 1603. Meanwhile, procedure display 1600 displays only "2-2: Procedure S2" surrounded by a double line, indicating that procedure S2 is the procedure currently being performed. Furthermore, procedure S1 has already been performed successfully, and is therefore displayed in black. The procedure importance P51 for when operator A performs the procedure is determined to be "high," and procedures S2, S3, S4, and S5 (such as "2-2: Procedure S2") are highlighted in white.

[0079] In the first embodiment, the plant status determination unit and the operating status determination unit determine the current plant status and operating status, but it is also possible to determine future status by predicting the future using, for example, a simulator.

[0080] Furthermore, in the first embodiment, for the sake of simplicity, an example in which one plant is operated is described. However, this is not limited to this, and it is also possible to determine the priority of the work procedures for the multiple plants by applying this to the case in which multiple plants are operated simultaneously.

[0081] According to the first embodiment, it is possible to reflect changes in the status of the operator in determining the importance of each procedure, thereby providing more appropriate operational support. More specifically, the system includes: a risk calculation unit that calculates a risk of failing to respond to an event based on a plant status including whether or not an event to be addressed has occurred, an operational status including which procedure is currently being performed, and predetermined risk information; a procedure key index calculation unit that calculates a procedure key index, which is an important index of the procedure, based on the risk; an operation influence factor determination unit that determines an operation influence factor of the operator based on a performance status based on performance information indicating the internal characteristics of the operator, an environmental status based on environmental information indicating the external characteristics of the operator, and predetermined operation influence factor rules; a procedure importance determination unit that determines the procedure importance of the procedure when the operator performs the procedure based on the procedure key index, the operation influence factor, and the predetermined procedure importance rules; and a procedure information presentation unit that presents procedure information reflecting the procedure importance to the operator.

[0082] The risk calculated by the risk calculation unit and the procedure key indicators for each procedure calculated based on this are calculated based on plant information, such as the plant status and operating status of the plant, while the operation influence factors are determined based on information indicating the current state of the operator, such as performance status and environmental information. Therefore, the procedure importance determined based on the procedure key indicators and operation influence factors reflects not only plant information but also the current state of the operator, so that changes in the operator's status are reflected in the determination of the importance of each procedure. Furthermore, by presenting procedure information that reflects the procedure importance determined as described above to the operator, the operator's attention is drawn and the order in which procedures should be performed is supported. This reduces the risks associated with plant operation and improves work efficiency, thereby providing more appropriate operational support.

[0083] Second Embodiment Next, a second embodiment will be described with reference to FIGS. 17 to 20. Components that are the same as or equivalent to those in FIGS. 1 to 16 are designated by the same reference numerals, and their description will be omitted. FIG. 17 is a functional block diagram showing a plant operation support system according to the second embodiment. The basic configuration of the plant operation support system 200 is similar to that of the plant operation support system 100 of the first embodiment, and therefore differences from the plant operation support system 100 will be mainly described. To avoid cluttering the drawing, the procedure importance rule storage unit 107 and the procedure importance rule P93 are omitted from FIG. 17, but the procedure importance rule storage unit 107 and the procedure importance rule P93 are the same as those in the first embodiment. The hardware configuration for implementing each functional unit of the plant operation support system 200 is also the same as that in the first embodiment.

[0084] The plant operation support system 200 further includes an operation influencing factor storage unit 108 , an operation result storage unit 109 , an operation result acquisition unit 131 , and an operation influencing factor rule modification unit 132 .

[0085] The driving influence factor determination unit 225, like the driving influence factor determination unit 125 in embodiment 1, determines driving influence factors P42 for each operator, outputs the driving influence factors P42 to the procedure importance determination unit 128, and stores the driving influence factors P42 in the driving influence factor storage unit 108.

[0086] The driving result acquisition unit 131 acquires driving result information P94 that indicates the driving results of each operator and is stored in the driving result storage unit 109. The driving result information P94 stored in the driving result storage unit 109 includes the response speed and operation error rate of each operator. The response speed can be measured by measuring the time from when a procedure is displayed to when the operation is performed. The operation error rate can be measured by comparing the procedure content with the operation history.

[0087] The operation influence factor rule modification unit 132 creates modified operation influence factor rules P95 as operation influence factor rules suitable for each operator, based on the operation influence factors P42 for each operator stored in the operation influence factor storage unit 108 and the operation result information P94 for each operator acquired by the operation result acquisition unit 131. The operation influence factor rule modification unit 132 outputs the modified operation influence factor rules P95 to the operation influence factor rule storage unit 105.

[0088] FIG. 18 is a diagram illustrating an example of the relationship between driving influence factors and driving results according to the second embodiment. The relationship table 1800 shows the relationship between factors that determine the driving influence factor P42, i.e., the performance status P23 and the environmental status P24, and the driving results of each operator. The relationship table 1800 includes a driving influence factor element column 1801 that indicates the factors that determine the driving influence factor P42, and a first driving result column 1802, a second driving result column 1803, and a third driving result column 1804 that indicate the driving results of Operator A, Operator B, and Operator C, corresponding to each element in the driving influence factor element column 1801. For example, the first row of the relationship table 1800 indicates the driving results of each operator when the performance status P23 is "good." Comparing the first and third rows of the relationship table 1800 reveals how the driving results of each operator change when the performance status P23 is "good" and when the performance status P23 is "bad." When the performance status P23 changes from "good", "fair" to "poor", the changes in the driving results of each operator are "good", "fair", and "poor" for Operator B and Operator C, whereas they are "good", "good", and "fair" for Operator A. This indicates that the driving results of Operator A are less susceptible to the impact of a decline in the performance status P23 compared to Operator B and Operator C. The relationship table 1800 may be stored in the driving influencing factor rule correction unit 132 or in another storage unit (not shown).

[0089] The operation influence factor rule modification unit 132 creates modified operation influence factor rules P95 based on the relationship between the elements of the operation influence factors P42 shown in the relationship table 1800 and the operation results of each operator. FIG. 19 is a diagram showing an example of modified operation influence factor rules according to the second embodiment. Similar to the operation influence factor rule table 700, the modified operation influence factor rule table 1900 includes a performance status column 1901 indicating the performance status P23, a first environmental status column 1902 indicating the operation influence factors P42 when the environmental status P24 is "good," a second environmental status column 1903 indicating the operation influence factors P42 when the environmental status P24 is "passable," and a third environmental status column 1904 indicating the operation influence factors P42 when the environmental status P24 is "unacceptable." Note that in the modified operation influence factor rule table 1900, the values ​​of the operation influence factors P42 that have changed from those in the operation influence factor rule table 700 shown in FIG. 7 are underlined. As described above, the driving results of operator A are not easily affected by a decline in the performance status P23. For this reason, the driving influence factors P42 when the performance status P23 is "fair" or "poor" are comparable to the driving influence factors P42 when the performance status P23 is "good" or "fair" in the driving influence factor rule table 700.

[0090] The modified operation influence factor rule P95 is also stored in the operation influence factor rule storage unit 105 and is treated in the same way as the operation influence factor rule P92. However, the modified operation influence factor rule P95 is generated based on the operation result information P94 of each operator and is stored corresponding to each operator. When determining the operation influence factors P42, the operation influence factor determination unit 225 determines the modified operation influence factor rule P95 or the operation influence factor rule P92 to be applied based on the operator's operation influence factor P42 to be determined. In the second embodiment, the modified operation influence factor rule P95 (modified operation influence factor rule table 1900) described above is used for operator A, and the operation influence factor rule P92 (operation influence factor rule table 700) is used for operators B and C. If the modified operation influence factor rule P95 corresponding to the target operator does not exist, the operation influence factor rule P92 is used to determine the operation influence factor P42.

[0091] In the second embodiment, the procedure importance index P41 is calculated in the same manner as in the first embodiment. That is, the procedure importance index P41 for each procedure when procedure S2 is performed is 166667, as described above. Furthermore, the performance status P23 of operator A is determined to be "fair." The environmental status P24 is determined to be "good." As described above, the corrected operation influence factor rule P95 (corrected operation influence factor rule table 1900) is used to determine the operation influence factor P42 for operator A, so the operation influence factor P42 in this case is determined to be "1." As a result, the product of the procedure importance index P41 and the operation influence factor P42 is 166667. Based on the example of the procedure importance rule shown in FIG. 12 , the procedure importance P51 for operator A when performing each procedure when procedure S2 is performed is determined to be "medium."

[0092] FIG. 20 is a diagram showing an example of presentation by the procedure information presentation unit according to the second embodiment, showing an example of presentation when procedure S2 is being performed. The procedure display 2000 has the same basic configuration as the procedure display 1600, and includes a header 2001 showing information such as the date and time, the event being handled, and the operator, a procedure flow display 2002, and a procedure content display 2003. Meanwhile, in the procedure display 2000, the procedure importance P51 for procedures S2, S3, S4, and S5 when performed by operator A is determined to be "medium." Therefore, the display is different from when the procedure importance P51 is determined to be "high." For example, this can be done by changing the color. Furthermore, because the procedure importance P51 is not "high," no warning, such as an audible alarm, is issued.

[0093] In the second embodiment, the driving results for each operator are shown in three stages, and the driving influence factor rule correction unit 132 has explained a method for correcting the driving influence factor rules P92 using a simple method of comparing the elements of the driving influence factors P42 with the driving results. However, the method for correcting the driving influence factor rules P92 is not particularly limited, and machine learning including deep learning may also be used.

[0094] According to the second embodiment, it is possible to obtain the same effects as those of the first embodiment. Furthermore, it is possible to improve the accuracy of the procedure importance. More specifically, the system further includes an operation result acquisition unit that acquires operation results by operators, and an operation influence factor rule modification unit that compares the operation influence factors with the operation results and creates modified operation influence factor rules by modifying the operation influence factor rules based on the obtained results, where the operation influence factor rule modification unit creates modified operation influence factor rules corresponding to each operator, and the operation influence factor determination unit uses the modified operation influence factor rules corresponding to the target operator when determining operation influence factors.

[0095] The relationship between operational influence factors and operational results is compared and evaluated for each operator, and the operational influence factor rules are revised based on the evaluation results to suit the operator's characteristics. This makes it possible to reflect the operator's characteristics in the procedure importance, thereby increasing the accuracy of the procedure importance. As a result, risks associated with plant operation can be further reduced and work efficiency can be further improved.

[0096] Although various exemplary embodiments and examples are described in this application, the various features, aspects, and functions described in one or more embodiments are not limited to the application of a particular embodiment, but may be applied to the embodiments alone or in various combinations. Therefore, countless modifications not illustrated are contemplated within the scope of the technology disclosed in this application. For example, this includes cases where at least one component is modified, added, or omitted, or where at least one component is extracted and combined with components of another embodiment.

[0097] 100, 200 Plant operation support system, 105 Operation influence factor rule storage unit, 106 Risk information storage unit, 107 Procedure importance rule storage unit, 108 Operation influence factor storage unit, 109 Operation result storage unit, 111 Plant information acquisition unit, 112 Operation information acquisition unit, 113 Performance information acquisition unit, 114 Environmental information acquisition unit, 121 Plant status determination unit, 122 Operation status determination unit, 123 Performance status determination unit, 124 Environmental status determination unit, 125, 225 Operation influence factor determination unit, 126 Risk calculation unit, 127 Procedure importance index calculation unit, 128 Procedure importance determination unit, 129 Procedure information presentation unit, 130 Procedure importance warning unit, 131 Operation result acquisition unit, 132 Operation influence factor rule correction unit, 400, 1300, 1600, 2000 Procedure display, 500, 1500 Performance status determination table, 600 Environmental status determination table, 700 Operation influence factor rule table, 800, 900, 1000, 1100, 1400 Risk tree, 1200 Procedure importance rule table, 1900 Correction operation influence factor rule table, P11 Plant information, P12 Operation information, P13 Performance information, P14 Environmental information, P21 Plant status, P22 Operation status, P23 Performance status, P24 Environmental status, P31 Risk, P41 Procedure important indicator, P42 Operation influence factor, P51 Procedure importance, P91 Risk information, P92 Operation influence factor rule, P93 Procedure importance rule, P94 Operation result information, P95 Correction operation influence factor rule

Claims

1. A plant operation support system that supports an operator in operating a plant, A plant information acquisition unit that acquires plant information of a plant; a plant status determination unit that determines a plant status, including the occurrence of an event that requires a response, based on the plant information; an operation information acquisition unit for acquiring operation information of the plant; a driving situation determination unit that determines a driving situation based on the driving information, including which of one or more procedures included in the response to the event is currently being performed; a performance information acquisition unit that acquires performance information indicating an internal characteristic of the operator; a performance status determination unit that determines a performance status based on the performance information; an environmental information acquisition unit that acquires environmental information indicating an external characteristic of the operator; an environmental status determination unit that determines an environmental status based on the environmental information; a risk calculation unit that calculates a risk of failing to respond to the event based on the plant status, the operation status, and predetermined risk information; a procedure key indicator calculation unit for calculating a procedure key indicator, which is an important indicator of the procedure, based on the risk; an operation influence factor determination unit that determines an operation influence factor of the operator based on the performance status, the environmental status, and a predetermined operation influence factor rule; a procedure importance determination unit that determines a procedure importance of the procedure when the procedure is performed by the operator based on the procedure importance indicator, the operation influence factor, and a predetermined procedure importance rule; a procedure information presentation unit that presents procedure information reflecting the procedure importance to the operator; A plant operation support system comprising:

2. An operation result acquisition unit that acquires the operation results of the plant by the operator, and an operation influence factor rule modification unit that compares the operation influence factors with the operation results and creates modified operation influence factor rules by modifying the operation influence factor rules based on the obtained results, 2. The plant operation support system according to claim 1, wherein the operation influence factor rule modification unit creates the modified operation influence factor rule corresponding to each of the operators, and the operation influence factor determination unit uses the modified operation influence factor rule corresponding to the target operator when determining the operation influence factors.

3. 3. The plant operation support system according to claim 1, further comprising a procedure importance warning unit that outputs a warning according to the procedure importance.

4. The plant operation support system according to claim 3 , wherein the procedure importance warning unit outputs the warning to personnel other than an operator who is taking the action.

5. 3. The plant operation support system according to claim 1, wherein the procedure key indicator calculation unit calculates the procedure key indicator of the target procedure by comparing the risk calculated without specifying any condition with the risk calculated under a condition that the target procedure will fail.