JP2013105221A - Maintenance parts delivery support system, maintenance parts delivery support device and maintenance parts delivery support program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a maintenance parts delivery support system that, when any trouble occurs to a device to be maintained, can quickly arrange for supply of maintenance parts to reduce the downtime of the troubled device while suppressing extra costs and cash flow disturbance due to returning of earlier arranged-for parts.SOLUTION: A maintenance parts delivery support system for inputting delivery arrangement information on delivery to the maintenance work site maintenance parts needed for supporting maintenance work on a manufacturing apparatus and checkup apparatuses and instructing a warehouse of parts to ship the maintenance parts comprises: a diagnostic trouble tree information managing unit 312 that manages a tree-form configuration of diagnostic trouble tree information on candidates for treatments needed for restoration of the device to be maintained from a failure phenomenon and specifying candidates for treatments; a maintenance work information managing unit 331 that manages work record information on maintenance works accomplished in the installed site of the device; and a maintenance parts delivery support information managing unit that figures out instructions for advance arrangements for the maintenance parts on the basis of the expected value of a returning cost.

Description

  The present invention relates to a maintenance parts delivery support system, a maintenance parts delivery support apparatus, and a maintenance parts delivery support program for supporting delivery of maintenance parts to a maintenance site in maintenance work of a manufacturing apparatus or an inspection apparatus.

  In order to maintain the quality of manufacturing equipment and inspection equipment over a long period of time, it is necessary to appropriately perform maintenance work such as replacement of parts periodically or when a failure occurs. In addition, for service forms that guarantee a certain level of availability and quality in maintenance contracts, how accurately and efficiently perform fault diagnosis in the event of a failure, perform maintenance work such as necessary part replacement. Improving service level by reducing downtime due to the system will lead to an improvement in order competitiveness, and at the same time, directly improve profitability by reducing maintenance parts costs and work costs.

  In failure recovery work for problems caused by wear and deterioration of medical equipment including medical diagnostic imaging equipment such as MRI, CT, X-ray diagnostic equipment, and ultrasonic diagnostic equipment, service personnel and operators first select the maintenance target equipment as a failure phenomenon. Such as parts replacement and adjustment by following a predetermined work procedure described in the diagnostic failure tree (diagnostic fault tree) for identifying the candidate for the treatment work and the treatment work candidate necessary for recovery from the Identify the necessary action. In addition, a general method is to arrange for delivery of maintenance parts necessary for treatment to the site. Here, the diagnostic failure tree has a binary tree structure, and a node indicating a device failure phenomenon is held in the highest hierarchy, and a node indicating a candidate for a work to be recovered is held in the lowest hierarchy. . The intermediate layer holds a node indicating diagnostic work for identifying an appropriate action for the failure phenomenon, and the node indicating the diagnostic work holds two child nodes corresponding to the diagnosis result of either Yes or No. It shall be. However, with this method, it is possible to arrange delivery of necessary maintenance parts with high accuracy, while shortening the time required for parts to arrive at the maintenance site and allowing for quicker replacement of parts. It has become an issue.

  As a background art in the technical field for solving this problem, there is JP-A-2007-164724 (Patent Document 1). This gazette uses sensor information sent from copiers, etc. to detect failure signs, and automatically arranges delivery of maintenance parts required for repair to the customer site at the timing of failure occurrence and periodic inspection. The system to be described is described.

JP 2007-164724 A

  The following problems remain in the prior art. The technique of Patent Document 1 arranges delivery arrangement of necessary maintenance part candidates at the stage of detecting a failure sign using sensor data acquired from a sensor installed in the apparatus. It is not envisaged to arrange delivery of maintenance part candidates after performing failure diagnosis for narrowing down candidates for treatment work necessary to restore the apparatus after detecting the error. Therefore, when the delivered part does not hit the cause of the failure and reversal occurs, in addition to the cost burden when the unit price of the maintenance part is high, the part is also used when the lead time is long, such as delivery to a global base. The stock standard will be pushed up, which will cause the cash flow to deteriorate, making it difficult to apply the technology.

  Therefore, the problem of the present invention is to quickly select maintenance part candidates in order to reduce the downtime of the apparatus while suppressing the cost burden and the deterioration of the cash flow due to the reversal when the apparatus to be maintained has a problem. It is to provide a maintenance parts delivery support program that arranges and delivers to a maintenance site, and a system that realizes this method.

  In order to achieve the above object, a maintenance part delivery support system for supporting delivery of maintenance parts necessary for maintenance work of an apparatus, comprising a calculation unit and a storage unit, wherein the storage unit permits delivery of maintenance parts. The delivery permission standard which is the standard value of the expected value of the reversal cost of whether or not to perform is held, and the arithmetic unit inputs the work record information of the maintenance work, so that the apparatus is restored by replacing the maintenance parts A component hit rate information management unit that calculates a component hit rate that is a probability, and a maintenance that calculates an expected value of the cost corresponding to the component hit rate that occurs when the maintenance component is returned to the maintenance site after being returned. A parts arrangement cost information management unit, and a maintenance parts arrangement instruction information management unit that permits delivery of the maintenance parts when an expected value of the reversal cost corresponding to the part hit rate is equal to or less than the delivery permission standard. It is set as the structure provided.

  According to the present invention, it is possible to parallelize the work of failure diagnosis and parts delivery, and there is an effect of reducing the downtime of the equipment by shortening the work time. In addition, the management of the return of maintenance parts is sophisticated, and the prediction accuracy of the return cost is improved.

It is a figure explaining the maintenance service model of one Embodiment of this invention. It is a system function block diagram of one Embodiment of this invention. It is a figure explaining the hardware constitutions of the information terminal of a maintenance components delivery support system. It is a figure explaining the processing step of the system of one embodiment of the present invention. It is a flowchart of defect information reception processing. It is a flowchart of a balancing coefficient calculation process. It is a flowchart of a component hit rate calculation process. It is a flowchart of a maintenance parts delivery arrangement instruction calculation process. It is a flowchart of a maintenance part use instruction | indication calculation process. It is a figure explaining the data structure of the reception information storage part. It is a figure explaining the data structure of the diagnostic failure tree information storage part. It is a figure explaining the data structure of the maintenance parts delivery support information storage part 43. FIG. It is a figure explaining the data structure of the maintenance work information storage part. It is a figure explaining the data structure of the maintenance components information storage part. 4 is a diagram for explaining a data structure of a sensor information storage unit 46. FIG. 6 is a diagram for explaining a data structure of an alarm information storage unit 47. FIG. It is a figure which shows the process outline | summary of a maintenance components delivery assistance system. It is a figure which shows the output screen of a prior arrangement instruction | indication.

  Hereinafter, an embodiment of a maintenance parts delivery support system according to the present invention will be described.

"Maintenance service model of one embodiment of the present invention"
A maintenance service model assumed as an application target of the failure diagnosis system of the present embodiment will be described with reference to FIG. The main object of the present invention is medical equipment such as an MRI apparatus, an X-ray CT apparatus, an X-ray diagnostic apparatus, and an ultrasonic diagnostic apparatus. However, the object is not limited to this example, and can also be applied to manufacturing apparatuses such as power generation facilities, plants, construction machinery, aircraft, automobiles, elevators, and inspection apparatuses such as an optical microscope.

  The support center ε periodically or when the maintenance target device is determined to be in an abnormal state based on the trouble report 27 or the sensor data 28 reported from the users of the maintenance target device installation sites β1, β2,. Whether the maintenance work is necessary or not is determined using the alarm information 26 automatically issued as a trigger. If maintenance work is necessary, the parts delivery instruction 22 for the maintenance parts 52 is sent from the warehouse γ to the device installation sites β1, β2,..., Βm to be subjected to maintenance work, and the service bases α1, α2,. The maintenance worker dispatch instruction 24 of the maintenance worker 51 is performed. Here, the service bases α1, α2,..., Αn are arranged in each region, and each is responsible for maintenance work of a plurality of maintenance target device installation sites β1, β2,. The maintenance parts 52 that are delivered to the maintenance target device installation sites β1, β2,..., Βm and are not used are returned and returned to the warehouse γ again.

  The maintenance record 52 and the maintenance work record 23 of the maintenance parts 52 are registered in the maintenance parts delivery support system at the warehouse γ and the service bases α1, α2,..., Αn, respectively, and are supported using the accumulated maintenance case information. In order to generate maintenance work support information 25 at the center ε and use it for support of maintenance work, the support center ε contacts the maintenance worker 51, and the maintenance worker 51 refers to the maintenance work support information 25, The maintenance part 22 to be replaced is selected.

“Outline of One Embodiment of the Present Invention”
An outline of processing of the maintenance parts delivery support system of this embodiment will be described with reference to FIG. This maintenance parts delivery support system requires that the maintenance target device be restored when a failure due to wear or deterioration occurs in the maintenance target device, or when a maintenance worker finds a sign of failure during regular inspection. Used when Based on the device failure diagnosis information, the hit rate, which is the probability that the device will be restored by replacement of maintenance parts, is updated sequentially, and the expected value of the reversal cost is calculated. It is a system that presents instructions for making advance arrangements for maintenance parts or instructions for using maintenance parts.

  When a failure or a sign of a failure is found in a device, failure diagnosis is performed to identify an effective restoration work using the state of the device or the value of sensor data attached to the device as a clue. In the calculation of maintenance part advance arrangement instructions, the relationship between the expected value of the reversal cost, which includes factors such as the unit price according to the hit rate of parts held for each part, packing costs, delivery costs, and cash flow deterioration Information is retained. Using this information, the hit rate that satisfies the parts arrangement criteria is calculated. An instruction is issued when the hit rate calculated from the failure diagnosis information of the device that is sequentially updated satisfies the parts arrangement criteria.

  Similarly, when the delivered maintenance parts are used for replacement and returned, additional costs such as parts replacement work costs and quality test costs for return are required. Thus, the hit rate that satisfies the component usage standard is calculated, and when the hit rate is satisfied, a maintenance part replacement work instruction is issued.

  In the table in FIG. 17, the horizontal axis indicates the hit rate and the vertical axis indicates the part name, and is a table indicating the part arrangement criteria based on the expected value information of the return cost when a return occurs for each part. For example, since the part C has a low return cost, it indicates that the parts are arranged in advance even if the hit rate is as low as 60%. On the other hand, since the return cost of the part B is high, the hit rate, which is a reference for the preliminary arrangement of parts, is set to 80%. As shown in the graph in FIG. 17, the hit rate at which each part can be arranged in advance is obtained based on the expected cost value based on the product of the return cost and the hit rate.

  Further, the numerical value of the hit rate is updated when the failure diagnosis of the apparatus is advanced. The diagnostic fault tree in FIG. 17 indicates that the hit rate of a predetermined part is updated as the diagnosis progresses. For example, as the diagnosis progresses to (1) and (2), the hit rate increases from 5% to 18% and 45%, but when it reaches 45%, the return cost when using the part is reduced. At this point, an instruction is given for prior arrangement of the part.

  The expected hit rate and return cost calculated in the process of calculating the advance arrangement instruction and replacement work instruction for the maintenance parts are, for example, as shown in FIG. 18 used when the service center operator navigates the local service personnel. Displayed on the operation screen. In this operation screen, a diagnostic failure tree is displayed, and the expected hit rate and return cost of the corresponding maintenance part in each work are displayed. In addition, whether or not the maintenance parts can be delivered and used or not is also displayed, and the delivery of maintenance parts that can be delivered can be arranged on the screen. Also, on the left side of the display screen, the work contents of each work in the diagnostic failure tree are described, and the work result can be input with Yes and No. As the input of these work results proceeds, the hit rate is updated.

  Even when there is no prior arrangement instruction or replacement work instruction, it is also possible to use an operational configuration in which decision making for advance arrangement or maintenance parts replacement is made based on human judgment while checking the expected hit rate and return cost. .

  In calculating the hit rate, it is necessary to correct the difference in the sensitivity of the number of cases accumulated for each treatment operation caused by the distortion of the shape of the diagnostic failure tree as preprocessing. In this correction, the balancing coefficient is calculated according to the depth of the hierarchy of the treatment work in the fault diagnosis tree, and weighting is performed by multiplying the balancing coefficient by the number of cases to equalize the sensitivity of the number of cases for each treatment work. To do.

“System Configuration of One Embodiment of the Present Invention”
The configuration of the maintenance parts delivery support system of this embodiment will be described with reference to FIG. The maintenance part arrangement support system calculates an expected value of the reversal cost based on the failure diagnosis information, a maintenance part delivery support module 11 for calculating an advance arrangement of the maintenance part or a use instruction for the maintenance part, and a maintenance Maintenance part information management module 12 for managing the expected value of the return cost for each maintenance part price, delivery cost, inventory status, hit rate, and work record information of maintenance work performed at the equipment installation site. A maintenance work information management module 13 to be managed, a display terminal module 14 that outputs to a maintenance work support terminal that presents instructions for advance arrangement and use of parts for maintenance parts to each maintenance worker, and each installed in a maintenance target device Sensor data management that manages data acquired from sensors and sends alarm information to the support center when sensor data shows abnormal values Module 15, maintenance part delivery support module 11 and display terminal module 14 at support center ε, maintenance part information management module 12 at warehouse γ, and maintenance work at service bases α 1, α 2,. The recorded information management module 13 includes a display terminal module 14 in an information terminal carried by a maintenance worker 21 and a sensor data management module 15 in maintenance target device installation sites β1, β2,. Each component module 11 to 15 is connected to a network 71, and each information terminal 11 to 15 can transmit and receive various data and the like via the network 71.

  As shown in FIG. 3, the information terminals 11 to 15 are all computers, such as an input device 61 such as a keyboard and a mouse, an output device 62 such as a display, an auxiliary storage device 63, a maintenance parts delivery support program, and the like. And an arithmetic device 60 for executing the various programs. The arithmetic device 60 includes a central processing unit (hereinafter referred to as CPU) 64, a main storage device 65, and an interface 66. The arithmetic device 60 is connected to an input device 61, an output device 62, and an auxiliary storage device 63 via an interface 66.

  In the present embodiment, execution results of various programs such as the maintenance parts delivery support program are stored in a storage area secured in the main storage device 65. Various programs are stored in advance in the auxiliary storage device 63, and then read into the main storage device 65 and executed by the CPU 64. Various functions described below are realized by the execution of various programs by the CPU 64.

  In this embodiment, the case where each information terminal constituting the maintenance part delivery support system is realized by a general-purpose information processing apparatus and software will be described as an example. For example, hardware including hard-wired logic, such as It may be realized by simple hardware and a pre-programmed general-purpose information processing apparatus.

  In the present embodiment, the maintenance parts delivery support system is described as an integrated system, but the present invention is not limited to this. The present invention may be configured to be incorporated in other information processing systems and function as a part thereof. Further, a part of each information terminal function may be rearranged, subdivided, or combined.

  Next, the functional configuration of each information terminal 11 to 15 constituting the maintenance parts delivery support system and the data held by each information terminal 11 to 15 will be described with reference to FIGS. 2 and 10 to 16.

"Functional configuration and retained data content of one embodiment of the present invention"
As shown in FIG. 2, the management modules 11 to 15 of the failure diagnosis system of the present embodiment store arithmetic units 311 to 318, 321, 331, 341, 351, and 352 that execute various programs and various data. 41 to 47 storage units.

The calculation unit includes an alarm information in the event of a failure, a notification from the user, a reception information management unit 311 that manages the relationship between the diagnostic failure tree corresponding to them, and a treatment work necessary for recovery from each failure phenomenon. Diagnostic failure tree information management unit 312 for managing a diagnostic failure tree including information on a candidate and diagnostic work for specifying the candidate, and a maintenance component arrangement instruction for calculating an instruction to make a preliminary arrangement of maintenance parts based on the failure diagnosis information Based on the information management unit 313, the maintenance part arrangement cost information management unit 314 that calculates the expected value of the cost generated when the maintenance part is delivered to the maintenance site and returned without being used, and based on the failure diagnosis information After the maintenance part use instruction information management unit 315 for calculating the use instruction of the maintenance part, the maintenance part is delivered to the maintenance site, opened and replaced, and the operation of the apparatus is confirmed. Probability that the device is restored by replacing each maintenance part by inputting maintenance part use cost information management unit 316 that calculates the expected value of the cost that will occur when the parts are returned, and maintenance work record information The component hit rate information management unit 317 for automatically and sequentially calculating the component hit rate using the information of the determination reliability indicating the accuracy of the determination result of the failure diagnosis work, and the diagnostic failure tree used for the failure diagnosis Coefficient information management unit 318 for calculating the coefficient according to the shape of the object and correcting the sensitivity of the case learning, and the expected value of the cost information of the maintenance parts used in the maintenance work, the inventory status, and the return cost for each hit rate Maintenance part information management unit 321 that manages the maintenance work, maintenance work information management unit 331 that manages work record information of maintenance work performed at the device installation site, and advance arrangement and parts of maintenance parts A maintenance part delivery support information output unit 341 that outputs a maintenance instruction to each maintenance worker and a sensor data management unit 351 that manages data acquired from each sensor installed in the maintenance target device When,
And an alarm data management unit 352 that transmits alarm information to the support center when the sensor data indicates an abnormal value.

  As described above, each of the units 311 to 318, 321, 331, 341, 351, and 352 of the calculation unit functions by the CPU 64 executing various programs. Details of the operation of these functional units will be described later in the description of the processing flow.

  The storage unit includes a reception information storage unit 41 that stores alarm information at the time of a failure, keywords included in a report from the user, and corresponding information of a diagnostic failure tree, and recovery for each failure phenomenon. Diagnostic failure tree master information storage unit 42 storing a diagnostic failure tree including information on a candidate treatment operation necessary for diagnosis and a diagnostic operation for specifying it, and a maintenance component storing a diagnosis progress of each maintenance operation A delivery support information storage unit 43, a maintenance work information storage unit 44 for storing information on the content of maintenance work performed at the device installation site, and a maintenance for storing cost information and inventory status of maintenance parts used for the maintenance work A component information storage unit 45, a sensor data storage unit 46 that stores data of sensors installed to monitor the operation status of the maintenance target device, and the sensor data indicates an abnormal value Having an alarm data storage unit 47 the alarm data are stored, which are transmitted when.

  As shown in FIG. 10, the reception information storage unit 41 includes an alarm ID field 41a, a report keyword field 41b, a diagnostic failure tree ID field 41c, and a failure phenomenon description field 41d.

  As shown in FIG. 11, the diagnostic failure tree master information storage unit 42 includes a work ID field 42a, a work attribute field 42b, a work name field 42c, a work content / determination method field 42d, a work cost field 42e, Part number field 42f, Next work field 42g, determination certainty field 42h, hierarchy field 42i, hierarchy difference field 42j, balancing coefficient field 42k, determination coefficient field 42l, number of cases field 42m, and case point field 42n.

  As shown in FIG. 12, the maintenance part delivery support information storage unit 43 includes a part number field 43a, a hit rate field 43b, a reversal cost field 43c, a delivery reference field 43d, a use reference field 43e, and whether delivery is possible. It has a field 43f and a usability field 43g.

  As shown in FIG. 13, the maintenance work information storage unit 44 includes a maintenance ID field 44a, a site number field 44b, a work date field 44c, a product number field 44d, an alarm type / keyword field 44e, and a trigger information attribute. It has a field 44f, a diagnostic failure tree field 44g, a work No field 44h, a work ID field 44i, a judgment result field 44j, and a judgment certainty field 44k.

  As shown in FIG. 14, the maintenance part information storage unit 45 includes a part number field 45a, a part unit price field 45b, a delivery cost field 45c, an inventory quantity field 45d, and an expected return cost for each hit rate (parts). A field 45e, and a return cost expected value for each hit rate (when a part is used) field 45f.

  As shown in FIG. 15, the sensor data storage unit 46 has a product number field 46a, a site number field 46b, a date / time field 46c, and a sensor number field 46d.

  As shown in FIG. 16, the alarm information storage unit 47 has a product number field 47a, a site number field 47b, a date / time field 47c, and an alarm type field 47d.

"Overall process flow of maintenance parts delivery support system"
As shown in FIG. 4, the processing performed in the maintenance parts delivery support system selects the target fault tree from the contents of the received information such as an alarm transmitted from the maintenance target device or a report from the user when a failure occurs. Based on defect information reception processing S1, balancing coefficient calculation processing S2 that calculates a balancing coefficient that is a coefficient for equalizing the difference in sensitivity of the number of cases generated according to the shape of the diagnostic failure tree, and failure diagnosis information of the device The component hit rate calculation process S3 for sequentially updating the hit rate, which is the probability that the device will be restored by replacement of maintenance parts, and the reversal cost incurred when the previously arranged parts are not hit and are returned unopened A maintenance parts delivery arrangement instruction calculation process S4 that calculates an instruction as to whether or not to make an advance arrangement for maintenance parts during failure diagnosis, Calculates whether or not to make advance arrangements for maintenance parts during failure diagnosis, taking into account the return cost incurred when the previously arranged parts do not hit and are returned after being opened and used Maintenance part use instruction calculation processing S5. The execution result of the maintenance parts delivery support system is output to the maintenance work support terminal for presentation to the support center operator. Eventually, the operator arranges parts delivery, but the parts delivery may be automatically arranged based on the execution result of the maintenance parts delivery support system. The details of the above processing will be described in detail using a flowchart.

"Defect information acceptance process S1"
The process flow of the defect information acceptance process S1 will be described with reference to the flowchart shown in FIG. First, regarding the alarm information received from the alarm information storage unit 47 or the trouble communication notified from the user, the maintenance work information management unit 331 assigns a maintenance ID to the work that occurs and performs maintenance as trigger information. It is registered in the work record information storage unit 44 (S101), and it is determined whether the trigger information is an alarm report or a report from the user (S102).

  When the trigger information is an alarm notification, the maintenance work information management unit 331 refers to the reception information storage unit 41 by the diagnostic failure tree information management unit 312 and performs diagnosis corresponding to the alarm ID that triggers the work. The result of selecting the fault tree is registered for the maintenance ID in the maintenance work information storage unit 44 (S103). When the trigger information is a report from the user, the maintenance work information management unit 331 has the reception information management unit 311 refer to the reception information storage unit 41 and select a diagnostic failure tree corresponding to the report keyword. Is registered in the maintenance work information storage unit 44 (S104).

  The sensor data management unit 351 stores the data acquired from the sensor installed in the apparatus in the sensor data storage unit 46 together with attribute information such as the product number and site number of the target in which the sensor is installed.

  The alarm data management unit 352 refers to the data stored in the sensor data storage unit. For example, when the value of a certain sensor data exceeds a threshold set as a reference for alarm notification, the service center An alarm mail is issued to the operator, and information such as the target product number, site number, issue date / time, and alarm type related to the alarm is stored in the alarm information storage unit 47.

"Balancing coefficient calculation process S2"
The process flow of the optimum work calculation process S2 will be described with reference to the flowchart shown in FIG. First, the balancing coefficient information management unit 318, the selected in trouble information reception step S1 diagnosis fault tree, read diagnostic fault tree information storage unit 42, the work ID from A ₁ treatment work A _n hierarchy (h) _Is calculated and substituted for hmax. It should be noted that the hierarchy is sequentially counted with the hierarchy of the highest diagnostic work in the diagnostic failure tree being 1, and the hierarchy of the next lower work being 2 (S201). Subsequently, the diagnostic failure tree information storage unit 42 is read, the number of treatment operations of the diagnostic failure tree is substituted into n (S202), and i = 1 is set (S203). ID acquires the hierarchy _{(h i)} of the treatment work _{a i,} (S204), then the difference between the maximum value _{h max} of the hierarchy _{h i} and hierarchy of treatment work _{a i} to _{(g Ai) g Ai} = h _max -h _i calculated by, registered in the hierarchy difference diagnostic fault tree information storage unit 42 (S205), a balancing coefficient _{b i} of the treatment work _{a i} is calculated by (equation 1), diagnostic fault tree information storage unit 42 (S206),
(Formula 1) b _Ai = 2 ^gi
It is determined whether i = n (S207). If i = n is not satisfied, i + 1 is substituted for i, and the processing from S204 to S207 is repeated (S208). If i = n, the balancing coefficient calculation process S2 ends.

“Part Hit Rate Calculation Processing S3”
The process flow of the component hit rate calculation process S3 will be described with reference to the flowchart shown in FIG. First, the parts hit rate information managing unit 317 refers to the diagnostic fault tree information storage unit 42, the work ID is registered 1 from A ₁ to the value of the determination coefficient for all treatment work A _n (d _i), j = 1 is set (S301), and the work ID and determination result of the work No. k is obtained from the maintenance work information storage unit 44 (S302).
It is determined whether the determination result acquired in S302 is Yes or No (S303). If the determination result is Yes, the operation ID of the operation whose operation number is k is the corresponding operation ID from the diagnostic fault tree information storage unit 42. get the No side in the determination confidence, substituted in the _{p k} (S304),
If the determination result is No, the determination reliability on the Yes side of the work ID is acquired from the diagnostic fault tree information storage unit 42 for the work ID of the work whose work number is _k, and is substituted into p _k (S305). ) ,.

Next, with reference to the Next Working diagnostic fault tree information storage unit 42, the determination result of the extraction treatment work hanging on the opposite side, updated by substituting the d _i × p _k to the determination coefficient (d _i) Is registered in the diagnostic failure tree information storage unit 42 (S306), and it is determined whether or not all the work information performed is acquired (S307). If all the work information is not acquired, the maintenance work information storage is performed. The process from step S302 to step S307 is repeated with reference to the next work information of the unit 43 (S308),
Further, referring to the part number in the diagnostic failure tree information storage unit 42, the number of types of the part number of the maintenance part is substituted for m (S309), and if all work information is acquired, each action work The hit rate (HP _pj ) of the maintenance component P _j to be used is calculated by (Equation 2) (S310),
(Expression 2) HP _pj = Σ (work hit rate including maintenance parts) / ΣCP _Ai
It is determined whether j = m (S311). If j = m is not satisfied, j + 1 is substituted for j, and the processing from S310 to S311 is repeated (S312). If j = m, the component hit rate calculation process S3 ends.

  As described above, the component hit rate information management unit 317 sequentially updates the component hit rate by sequentially inputting the work record information of the maintenance work.

"Maintenance parts delivery arrangement instruction calculation process S4"
The flow of the maintenance parts delivery arrangement instruction calculation process S4 will be described with reference to the flowchart shown in FIG. First, the maintenance part arrangement instruction information management unit 313 sets j = 1 (S401), and the maintenance part information storage unit 45 expects a return cost whether or not to permit delivery arrangement of the part number Pj of the maintenance part. The delivery permission standard (DPj), which is a reference value of the value, is acquired and registered in the maintenance parts delivery support information storage unit 43 (S402), and then the hit rate of the maintenance parts Pj from the maintenance parts delivery support information storage unit 43 Next, based on information such as the unit price, delivery cost, and inventory quantity of the maintenance parts that are sequentially updated by the maintenance part information management unit 321, a return when the parts corresponding to the hit rate are not used is obtained. The maintenance part arrangement cost information management unit 314 that manages the insertion cost searches the maintenance part information storage unit 45 for the expected return value RCPj of the return cost corresponding to the hit rate of the maintenance part Pj acquired in S403. The result is acquired and registered in the maintenance parts delivery support information storage unit 43 (S404), and it is determined whether RCPj ≦ DPj (S405). If RCPj ≦ DPj, the maintenance parts delivery support information storage unit 43 is obtained. “No” is registered as the availability of delivery of the maintenance part Pj (S406), and when RCPj> DPj, “No” is registered as the availability of delivery of the maintenance part Pj in the maintenance part delivery support information storage unit 43 ( S407), the maintenance part delivery support information output unit 341 outputs whether or not the maintenance part Pj in the maintenance part delivery support information storage unit 43 can be delivered to a PC screen or the like that is referred to when the support center operator performs maintenance work support. (S408), it is determined whether j = m (S409). If j = m is not satisfied, j + 1 is substituted for j, and the processing from S402 to S408 is repeated (S410). If j = m, the maintenance parts delivery instruction calculation process S4 ends.

  The parts arrangement instruction information management unit 313 permits delivery of the maintenance parts based on the sequentially updated parts hit rate when the expected value of the reversal cost corresponding to the sequential part hit rate is equal to or less than the delivery permission standard. It becomes.

“Maintenance Parts Use Instruction Calculation Process S5”
The flow of the maintenance part use instruction calculation process S5 will be described with reference to the flowchart shown in FIG. First, the maintenance part use instruction information management unit 315 sets j = 1 (S501), and whether or not to permit the opening and use of the part number Pj of the delivered maintenance part from the maintenance part information storage unit 45 is determined. The use permission standard (UPj), which is the standard value of the expected return cost, is acquired and registered in the maintenance parts delivery support information storage unit 43 (S502), and then the maintenance parts are stored in the maintenance parts delivery support information storage unit 43. The Pj hit rate is acquired (S503), and then the component usage corresponding to the hit rate is used based on information such as the unit price, delivery cost, and inventory quantity of the maintenance component that is sequentially updated by the maintenance component information management unit 321. The maintenance component usage cost information management unit 316 that manages the reversal cost at the time from the maintenance component information storage unit 45 expects the reversal cost RC corresponding to the hit rate of the part number Pj acquired in S503. The search result of j is acquired and registered in the maintenance parts delivery support information storage unit 43 (S504), and it is determined whether RCPj ≦ UPj (S505). If RCPj ≦ UPj, the maintenance parts delivery support is obtained. “Yes” is registered as the availability of the maintenance part Pj in the information storage unit 43 (S506),
When RCPj> UPj, “impossible” is registered as the availability of the maintenance part Pj in the maintenance part delivery support information storage unit 43 (S507), and the availability of delivery of the maintenance part Pj in the maintenance part delivery support information storage unit 43 Is output to a PC screen or the like to be referred to when the support center operator performs maintenance work support by the maintenance parts delivery support information output unit 341 (S508),
It is determined whether j = m (S509). If j = m is not satisfied, j + 1 is substituted for j, and the processing from S502 to S508 is repeated (S510). If j = m, the maintenance component use instruction calculation process S5 is terminated.

  The “maintenance part use instruction calculation process S5” does not necessarily have to be performed after the “maintenance part delivery arrangement instruction calculation process S4”, and can be applied alone.

  As described above, according to the present invention, parts delivery work can be performed in parallel while proceeding with failure diagnosis, and equipment downtime due to reduction in work time can be reduced. In addition, the management of the return of maintenance parts can be advanced, and the prediction accuracy of the return cost can be improved.

11, 12, 13, 14, 15... Each component module of the maintenance parts delivery support system,
21, 22, 23, 24, 25, 26, 27, 28 ... data transmitted and received between each base,
311 to 318, 321, 331, 341, 351, 352 ... various calculation functions,
41, 42, 43, 44, 45, 46, 47 ... various storage functions,
51 ... maintenance worker, 52 ... maintenance parts,
60 ... arithmetic unit, 61 ... input device, 62 ... output device, 63 ... auxiliary storage device,
64... Central processing unit (CPU), 65... Main memory, 66 interface,
71 ... network,
S1 to S5, S101 to 104, S201 to S208, S301 to S312, S401 to S410, S501 to S510, various processing steps,
410, 420, 430, 440, 450, 460, 470, ... records in various storage units,
41a-41d, 42a-42n, 43a-43g, 44a-44k, 45a-45f, 46a-46d, 47a-47d ... fields of various storage units

Claims (15)

A maintenance parts delivery support system for supporting delivery of maintenance parts necessary for maintenance work of a device,
A calculation unit and a storage unit;
The storage unit holds a delivery permission standard that is a reference value of an expected value of the reversal cost of whether or not to permit the delivery of maintenance parts,
The computing unit is
A component hit rate information management unit that calculates a component hit rate that is a probability that the device is restored by replacing the maintenance component by inputting work record information of the maintenance work;
A maintenance part arrangement cost information management unit that calculates an expected value of a cost corresponding to the part hit rate that occurs when the maintenance part is returned after being delivered to the maintenance site;
A maintenance parts arrangement instruction information management unit that permits delivery of the maintenance parts when an expected value of the reversal cost corresponding to the parts hit rate is equal to or less than the delivery permission standard;
A maintenance parts delivery support system comprising: The maintenance parts delivery support system according to claim 1,
The storage unit holds a use permission standard that is a reference value of a reversal cost as to whether or not to permit opening and use of a delivered maintenance part,
The computing unit is
A maintenance part use cost information management unit that calculates an expected value of the cost corresponding to the part hit rate that occurs when the maintenance part is returned after being used at a maintenance site;
A maintenance part use instruction information management unit that permits use of the maintenance part when an expected value of the reversal cost corresponding to the part hit rate is equal to or less than the use permission standard;
A maintenance parts delivery support system characterized by comprising: The maintenance parts delivery support system according to claim 1,
The component hit rate information management unit updates the component hit rate sequentially by sequentially inputting work record information of maintenance work. In the maintenance parts delivery support system according to claim 3,
Based on the sequentially updated component hit rate, the component arrangement instruction information management unit sequentially permits delivery of the maintenance component when the expected value of the reversal cost corresponding to the component hit rate is equal to or less than the delivery permission standard. A maintenance parts delivery support system characterized by: The maintenance parts delivery support system according to claim 2,
The component hit rate information management unit sequentially updates the component hit rate by sequentially inputting work record information of maintenance work,
Based on the component hit rate that is sequentially updated, the component use instruction information management unit sequentially permits the use of the maintenance component when the expected value of the reversal cost corresponding to the component hit rate is equal to or less than the use permission criterion. A maintenance parts delivery support system characterized by: The maintenance parts delivery support system according to claim 1,
In the component hit rate information management unit, diagnostic failure tree information having a binary tree structure stored in the storage unit, a node indicating a device failure phenomenon is held in the highest layer, and a failure phenomenon is stored in an intermediate layer The diagnostic fault tree information is stored by referring to the diagnostic fault tree information that holds the node indicating the diagnostic work for identifying the treatment work for the target, and that holds the node indicating the candidate for the treatment work for restoring the device in the lowest hierarchy. A maintenance work parts delivery support system, characterized in that a part hit rate is calculated based on a determination certainty of the work obtained from. In the maintenance parts delivery support system according to claim 6,
A maintenance part delivery support system comprising a balancing coefficient information management unit that calculates a coefficient according to the shape of the diagnostic failure tree and corrects the sensitivity of case learning. A maintenance parts delivery support program that is executed in a maintenance parts delivery support system including a calculation unit and a storage unit and supports delivery of maintenance parts necessary for maintenance work of the device,
Obtaining a delivery permission standard that is a reference value of an expected value of a reversal cost as to whether or not to permit delivery of maintenance parts from the storage unit;
Calculating a part hit rate that is a probability that the apparatus is restored by replacing the maintenance part by inputting work record information of the maintenance work;
Calculating an expected value of the cost corresponding to the component hit rate that occurs when the maintenance part is returned after being delivered to the maintenance site;
Permitting delivery of the maintenance part when an expected value of the reversal cost corresponding to the part hit rate is equal to or less than the delivery permission standard;
A maintenance parts delivery support program comprising: In the maintenance parts delivery support program according to claim 8,
Obtaining from the storage unit a use permission standard that is a standard value of a reversal cost of whether or not to permit the opening and use of the delivered maintenance parts;
Calculating an expected value of the cost corresponding to the part hit rate that occurs when the maintenance part is returned after being used at a maintenance site;
Permitting the use of the maintenance part when an expected value of the reversal cost corresponding to the part hit rate is equal to or less than the use permission standard;
A maintenance parts delivery support program characterized by comprising: In the maintenance parts delivery support program according to claim 8,
A maintenance part delivery support program, wherein the part hit rate is sequentially updated by sequentially inputting work record information of maintenance work. In the maintenance parts delivery support program according to claim 10,
Maintenance part delivery characterized in that delivery of the maintenance parts is allowed sequentially when an expected value of a reversal cost corresponding to the part hit rate is equal to or less than the delivery permission standard based on the part hit rate that is sequentially updated. Support program. In the maintenance parts delivery support program according to claim 9,
By sequentially entering maintenance work record information, the component hit rate is updated sequentially,
Maintenance part delivery characterized in that, based on the part hit rate that is sequentially updated, the use of the maintenance part is allowed sequentially when the expected value of the reversal cost corresponding to the part hit rate is equal to or lower than the use permission standard. Support program. In the maintenance parts delivery support program according to claim 8,
Diagnosis failure tree information having a binary tree structure stored in the storage unit, wherein a node indicating a failure phenomenon of the device is held in the highest hierarchy, and a diagnosis for specifying a treatment operation for the failure phenomenon in an intermediate hierarchy The diagnosis reliability tree information obtained from the diagnostic failure tree information with reference to the diagnostic failure tree information that holds the node indicating the operation and holds the node indicating the candidate treatment operation for restoring the device in the lowest hierarchy. A maintenance work parts delivery support program characterized in that the parts hit rate is calculated based on the above. In the maintenance parts delivery support program according to claim 13,
A maintenance work part delivery support program comprising a step of calculating a coefficient according to the shape of the diagnostic failure tree and correcting the sensitivity of case learning In the maintenance parts delivery support device for entering the delivery arrangement information to the maintenance work site of maintenance parts necessary to support maintenance work of manufacturing equipment and inspection equipment, and instructing delivery to the parts warehouse,
A diagnostic failure tree information management means for managing diagnostic failure tree information in which a candidate for a treatment work necessary to recover a maintenance target device from a failure phenomenon and a diagnostic work for identifying a candidate for the treatment work are configured in a tree shape;
Maintenance work information management means for managing work record information of maintenance work performed at the device installation site;
Maintenance parts delivery arrangement instruction information management means for calculating an instruction to make an advance arrangement of maintenance parts based on an expected return cost;
Maintenance part arrangement cost information management means for outputting an expected value of the cost generated when the maintenance part is delivered to the maintenance site and returned without being used;
Maintenance parts usage instruction information management means for calculating maintenance parts usage instructions based on expected return costs;
Maintenance part use cost information management means for outputting an expected value of a cost generated when the maintenance part is delivered to the maintenance site, opened and replaced, and checked after the operation of the device is performed;
A component hit rate information management means for automatically and sequentially calculating a component hit rate, which is a probability that the device is restored by replacing each maintenance component by inputting work record information of maintenance work;
Balancing coefficient information management means for calculating a coefficient according to the shape of the diagnostic fault tree used for fault diagnosis and correcting the sensitivity of case learning;
A component hit rate information management means for calculating a hit rate using information of a determination certainty factor indicating accuracy of a determination result of failure diagnosis work in calculating a component hit rate;
A maintenance parts delivery support apparatus comprising:

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