JP7446549B1 - Maintenance planning support device, maintenance planning support method, maintenance planning support program, and maintenance planning support system - Google Patents

Abstract

The candidate extraction unit (25) extracts one or more candidate properties based on the distance from the route from the starting point to the maintenance property, with properties that have maintenance parts that require maintenance work as maintenance properties. The residual value calculation unit (26) calculates the residual value of the target part for each of the one or more extracted candidate properties based on the remaining life of the target part, which is a part to be maintained in the target candidate property. The maintenance cost calculation unit (23) calculates the maintenance cost for the target candidate property by subtracting the residual value from the standard cost.

Description

The present disclosure relates to maintenance planning support technology that takes into account the introduction of preventive maintenance.

For maintenance of elevators, air conditioning equipment, etc., maintenance personnel visit customer properties. In addition to labor costs, maintenance costs include labor costs for travel time and travel expenses, which are transportation costs.
Maintenance in remote locations often involves traveling for long periods of time to perform maintenance on a single item. As a result, travel expenses and travel time are a major burden on the maintenance side.

In the case of sudden response, it is not possible to flexibly adjust the schedule by coordinating the response with other properties. Emergency response is to respond after an abnormality due to failure or end-of-life occurs. Therefore, it is difficult to formulate an efficient maintenance plan in case of sudden response.
Preventive maintenance technology that utilizes remote maintenance is creating an environment in which maintenance can be performed before failures occur. However, in preventive maintenance, equipment that is not malfunctioning is maintained ahead of schedule. For example, parts with residual value may be replaced. In this case, an economic loss occurs to the customer receiving maintenance by the amount of the residual value. Therefore, preventive maintenance is difficult to be accepted by customers.

Patent Document 1 describes a technique for formulating a maintenance plan using a preventive maintenance technique. Specifically, Patent Document 1 states that properties to be maintained are selected and planned in such a way that maintenance costs are minimized, taking into account inspection timing, property location, residual value, and maintenance staff skills. It is stated that. This reduces travel costs and travel time.

Japanese Patent Application Publication No. 2012-133773

Patent Document 1 does not take into consideration the economic loss that occurs to customers due to preventive maintenance. Therefore, there is a possibility that the developed maintenance plan will not be accepted by the customer.
The present disclosure aims to support the formulation of a maintenance plan that takes into account the economic loss that occurs to customers due to preventive maintenance.

The maintenance planning support device according to the present disclosure includes:
a candidate extraction unit that extracts one or more candidate properties based on a distance from a route from a departure point to the maintenance property, with a property having a maintenance part that requires maintenance work as a maintenance property;
a residual value calculation unit that calculates the residual value of the target part from the remaining life of the target part, which is a part to be maintained in the target candidate property, for each of the one or more candidate properties extracted by the candidate extraction unit; and,
and a maintenance cost calculation unit that calculates maintenance costs for the target candidate property by subtracting the residual value calculated by the residual value calculation unit from the standard cost.

In the present disclosure, the maintenance cost is calculated by subtracting the residual value of the target part from the standard cost. This makes it possible to reduce economic losses caused to customers due to preventive maintenance. As a result, maintenance plans based on preventive maintenance will be more easily accepted by customers.

1 is a configuration diagram of a maintenance planning support device 10 according to Embodiment 1. FIG. 1 is a flowchart showing the overall operation of the maintenance planning support device 10 according to the first embodiment. FIG. 3 is an explanatory diagram of residual value calculation processing according to the first embodiment. FIG. 3 is an explanatory diagram of candidate exclusion processing according to the first embodiment. 5 is a flowchart of implementation date determination processing according to the first embodiment. FIG. 3 is an explanatory diagram of a specific example of implementation date determination processing according to the first embodiment. FIG. 3 is an explanatory diagram of a specific example of implementation date determination processing according to the first embodiment. FIG. 3 is an explanatory diagram of a specific example of implementation date determination processing according to the first embodiment. FIG. 3 is an explanatory diagram of a specific example of implementation date determination processing according to the first embodiment. FIG. 3 is an explanatory diagram of a specific example of implementation date determination processing according to the first embodiment. An explanatory diagram of the advantages and disadvantages of conventional preventive maintenance and emergency response. FIG. 2 is an explanatory diagram of the advantages and disadvantages of preventive maintenance and emergency response when the maintenance planning support device 10 according to the first embodiment is introduced. FIG. 3 is a configuration diagram of a maintenance planning support device 10 according to a first modification.

Embodiment 1.
***Explanation of configuration***
With reference to FIG. 1, the configuration of a maintenance planning support device 10 according to the first embodiment will be described.
The maintenance planning support device 10 is a computer.
The maintenance planning support device 10 includes hardware such as a processor 11, a memory 12, a storage 13, and a communication interface 14. The processor 11 is connected to other hardware via signal lines and controls these other hardware.

The processor 11 is an IC that performs processing. IC is an abbreviation for Integrated Circuit. Specific examples of the processor 11 include a CPU, a DSP, and a GPU. CPU is an abbreviation for Central Processing Unit. DSP is an abbreviation for Digital Signal Processor. GPU is an abbreviation for Graphics Processing Unit.

The memory 12 is a storage device that temporarily stores data. The memory 12 is, for example, SRAM or DRAM. SRAM is an abbreviation for Static Random Access Memory. DRAM is an abbreviation for Dynamic Random Access Memory.

The storage 13 is a storage device that stores data. The storage 13 is, for example, an HDD. HDD is an abbreviation for Hard Disk Drive. Furthermore, the storage 13 may be a portable recording medium such as an SD (registered trademark) memory card, CompactFlash (registered trademark), NAND flash, flexible disk, optical disk, compact disc, Blu-ray (registered trademark) disk, or DVD. good. SD is an abbreviation for Secure Digital. DVD is an abbreviation for Digital Versatile Disk.

The communication interface 14 is an interface for communicating with an external device. The communication interface 14 is, for example, an Ethernet (registered trademark), USB, or HDMI (registered trademark) port. USB is an abbreviation for Universal Serial Bus. HDMI is an abbreviation for High-Definition Multimedia Interface.

The maintenance planning support device 10 includes a target detection section 21, a candidate selection section 22, a maintenance cost calculation section 23, and an implementation date selection section 24 as functional components. The candidate selection section 22 includes a candidate extraction section 25 , a residual value calculation section 26 , a business trip expense calculation section 27 , and a candidate exclusion section 28 . The functions of each functional component of the maintenance planning support device 10 are realized by software.
The storage 13 stores programs that implement the functions of each functional component of the maintenance planning support device 10. This program is read into the memory 12 by the processor 11 and executed by the processor 11. Thereby, the functions of each functional component of the maintenance planning support device 10 are realized.

The storage 13 stores equipment status information 31, customer information 32, and parts information 33. The device status information 31 is information indicating the status of each of a plurality of devices to be maintained. The customer information 32 is information about customers who have a maintenance contract. The customer information 32 indicates the location of the customer's property, the model of equipment at the customer's property, and the like. The parts information 33 is information on parts that constitute each device. The component information 33 indicates, for each component, the component unit price, component life, date of introduction, and the like. Here, the component life may be a life predicted from past usage records of the component, or may be a service life determined by the manufacturer, etc., regardless of past usage records.

In FIG. 1, only one processor 11 was shown. However, there may be a plurality of processors 11, and the plurality of processors 11 may cooperate to execute programs that implement each function.

***Operation explanation***
The operation of the maintenance planning support device 10 according to the first embodiment will be described with reference to FIGS. 2 to 10.
The operation procedure of the maintenance planning support device 10 according to the first embodiment corresponds to the maintenance planning support method according to the first embodiment. Further, a program that realizes the operation of the maintenance planning support device 10 according to the first embodiment corresponds to the maintenance planning support program according to the first embodiment.

With reference to FIG. 2, the overall operation of the maintenance planning support device 10 according to the first embodiment will be described.

(Step S11: Target detection process)
The object detection unit 21 detects parts that require maintenance work such as inspection or repair as maintenance parts.
Specifically, the object detection unit 21 periodically collects device information from a condition monitoring system that monitors the condition of devices in the properties of each of a plurality of customers. The device information includes information such as operating data, sounds, vibrations, and images about the device. The object detection unit 21 predicts the state of the device from the device information and stores it in the storage 13 as device state information 31. The status of the equipment includes the deterioration status, expected lifespan, failure status, etc. of the equipment. The object detection unit 21 detects, as a maintenance component, a component whose device status is in a state requiring predetermined maintenance work.

(Step S12: Candidate extraction process)
The candidate extraction unit 25 sets the property containing the maintenance part detected in step S11 as the maintenance property X. The candidate extraction unit 25 extracts one or more candidate properties Y based on the distance from the route from the starting point to the maintenance property X. The starting point is a location where a worker who performs maintenance work is located. Here, the starting point is a maintenance office.
Specifically, the candidate extraction unit 25 identifies a route from the maintenance office to the maintenance property. The location of the maintenance property is specified by referring to the customer information 32. Identification of the route is realized by using an existing route search algorithm or the like. The candidate extraction unit 25 calculates the distance from each property of a plurality of customers to the nearest point on the route. The candidate extraction unit 25 extracts one or more properties whose distance is within the reference distance as candidate properties Y.

(Step S13: Residual value calculation process)
The residual value calculation unit 26 sets each of the one or more candidate properties Y extracted in step S12 as the target candidate property. The residual value calculation unit 26 calculates the residual value of the target part from the remaining life of the target part, which is the part to be maintained in the target candidate property.
Specifically, the residual value calculation unit 26 refers to the component information 33 and identifies the introduction date and component life of the target component. The residual value calculation unit 26 calculates the remaining life by subtracting the elapsed period from the date of introduction from the component life. The residual value calculation unit 26 calculates the residual value using a predetermined method based on the remaining life and the unit price of parts. For example, the residual value calculation unit 26 calculates the residual value by multiplying the component unit price by a value obtained by dividing the remaining life by the component life.
At this time, the residual value calculation unit 26 sets a fixed period based on the day when the remaining life of the maintenance part expires as a candidate period. Specifically, the residual value calculation unit 26 sets a certain period before the date when the remaining life of the maintenance part expires as the candidate period. The residual value calculation unit 26 sets each of a plurality of days in the candidate period as targets. The plurality of days in the candidate period are, for example, all business days of the maintenance company in the candidate period. The residual value calculation unit 26 calculates the residual value on the target date from the remaining life on the target date.

This will be explained in detail with reference to FIG. In FIG. 3, property 0 is maintenance property X where the maintenance component detected in step S11 is located. The four properties 1 to 4 are candidate properties Y extracted in step S12.
The remaining lifespan of maintenance property X becomes 0 on 3/31. The candidate period is set to be one month before March 31st. Then, for each of the four properties Property 1 to Property 4, the residual value is calculated for each day in the candidate period. The earlier the date, the longer the remaining life and therefore the higher the residual value.

(Step S14: Business trip expense calculation process)
The business trip expense calculation unit 27 sets each of the one or more candidate properties Y extracted in step S12 as the target candidate property. The business trip expense calculation unit 27 calculates business trip expenses for the target candidate property.
As a specific example, the travel expenses are determined in advance according to the distance from the maintenance office to the target candidate property. Therefore, the business trip cost calculation unit 27 calculates the distance from the maintenance office to the target candidate property. Then, the business trip cost calculation unit 27 specifies the business trip cost corresponding to the calculated distance.

(Step S15: Candidate exclusion process)
The candidate exclusion unit 28 sets, as excluded properties, properties whose residual value calculated in step S13 is higher than the business trip cost. The candidate exclusion unit 28 excludes excluded properties from the candidate properties Y.
Specifically, the candidate exclusion unit 28 sets each of the one or more candidate properties Y extracted in step S12 as the target candidate property. If the residual value of the target candidate property is higher than the business trip expense identified in step S14, the candidate exclusion unit 28 sets the target candidate property as an excluded property. Then, the candidate exclusion unit 28 excludes the excluded properties from the candidate properties Y.

Assume that the travel expenses for properties 1 to 4 in FIG. 3 are all ¥25,000. In this case, as shown in FIG. 4, property 3 is set as an excluded property because its residual value is higher than the business trip cost. Then, property 3 is excluded from candidate properties Y.
Note that there is a possibility that only some days in the candidate period may be excluded from candidate property Y. To be more precise, there is a possibility that only the early dates in the candidate period where the residual value is high may be excluded from candidate property Y.

(Step S16: Implementation date determination process)
The maintenance cost calculation unit 23 calculates the maintenance cost for each of the one or more candidate properties Y after the excluded properties are excluded in step S15. Then, the implementation date selection unit 24 displays the maintenance costs for each of the plurality of days for each of the maintenance property X and the one or more candidate properties Y after the excluded property has been excluded in step S15, and Accept selection.

With reference to FIG. 5, implementation date determination processing according to the first embodiment will be described.
(Step S21: Cost calculation process)
The maintenance cost calculation unit 23 calculates the maintenance costs of the maintenance property X and the candidate property Y.
Specifically, the maintenance cost calculation unit 23 sets the maintenance property X and each of the one or more candidate properties Y after the excluded properties have been excluded in step S14 as target candidate properties. The maintenance cost calculation unit 23 sets each of a plurality of days in the candidate period as targets. The maintenance cost calculation unit 23 calculates the maintenance cost for the target candidate property on the target date by subtracting the residual value on the target date calculated in step S13 from the standard cost.
Here, the maintenance cost is the sum of the travel cost and replacement cost. The standard cost is the sum of the travel cost for the target candidate property and the replacement cost for maintenance work for the target candidate property. The maintenance cost calculation unit 23 calculates the maintenance cost by subtracting the residual value from the replacement cost of the standard cost.

(Step S22: Order determination process)
The maintenance cost calculation unit 23 determines the order in which implementation dates are determined for the maintenance property X and one or more candidate properties Y. Specifically, the maintenance cost calculation unit 23 determines the order of implementation dates in descending order of remaining lifespan. Here, the implementation date is determined in order of shortest remaining life, 1, . ．． ．． , m.

1 is set as the initial value of variable n.

(Step S23: Schedule adjustment process)
The implementation date selection unit 24 sets the property with the n-th implementation date determination order as the target property. This means that among the properties for which maintenance implementation dates have not been determined, the property with the highest maintenance date determination order is set as the target property. The implementation date selection unit 24 indicates the maintenance costs for each of a plurality of days for the target property and accepts selection of a maintenance implementation date. For example, the implementation date selection unit 24 displays maintenance costs for each of a plurality of days on the user terminal of the target property, and allows the user to select a maintenance implementation date.
When the process of step S23 is executed for the first time, the implementation date selection unit 24 accepts selection of the maintenance implementation date for the maintenance property X.

(Step S24: Maintenance plan generation process)
The implementation date selection unit 24 updates the maintenance worker dispatch plan for the maintenance implementation date selected in step S23. Specifically, the implementation date selection unit 24 incorporates a plan for dispatching a maintenance worker to the property whose implementation date is determined in the n-th order. How to incorporate a plan to dispatch maintenance personnel is determined depending on the situation of the maintenance facility. The process of incorporating a plan for dispatching maintenance personnel may be performed by an existing planning system, or may be performed by an administrator or the like.

(Step S25: Upper limit determination process)
Regarding the day selected in step S23, the implementation date selection unit 24 determines whether or not the number of selections in which that day was selected as a maintenance implementation date has reached the maximum number of maintenance possible. The upper limit number of properties that can be maintained is the upper limit of the number of properties on which maintenance work can be performed in one day.
When the number of selections reaches the maintainable upper limit number, the implementation date selection unit 24 advances the process to step S26. On the other hand, if the number of selections has not reached the maintainable upper limit number, the implementation date selection unit 24 advances the process to step S27.

(Step S26: Schedule exclusion process)
The implementation date selection unit 24 excludes the day selected in step S23 from the days selectable as maintenance implementation dates. The excluded day will no longer be able to be selected as a maintenance implementation date in step S23.

(Step S27: Remaining candidate determination process)
The implementation date selection unit 24 determines whether there is a candidate property Y for which the maintenance implementation date has not been determined.
If the implementation date selection unit 24 exists, the implementation date selection unit 24 advances the process to step S28. On the other hand, if it does not exist, the process ends.

(Step S28: Cost recalculation process)
The maintenance cost calculation unit 23 recalculates the maintenance cost for each of the one or more candidate properties Y for which the maintenance implementation date has not been determined.
Specifically, the maintenance cost calculation unit 23 sets each of the one or more candidate properties Y whose maintenance implementation date has not been determined as the target candidate property. The maintenance cost calculation unit 23 recalculates the maintenance cost for the maintenance implementation date selected in step S23 by further subtracting a part of the business trip cost to the target candidate property from the standard cost. Here, the maintenance cost calculation unit 23 subtracts a part of the business trip cost from the business trip cost of the standard cost to recalculate the maintenance cost.

In the first embodiment, the maintenance cost calculation unit 23 uses, as part of the business trip cost, an amount obtained by multiplying the business trip cost by a ratio corresponding to the number of properties to be maintained on the maintenance date. Here, the maintenance cost calculation unit 23 uses an amount obtained by multiplying the travel cost by (1-(1/(number of properties to be maintained on the maintenance date + 1))) as part of the travel cost.
For example, if the number of properties to be maintained on the maintenance day is 1, the amount obtained by multiplying the travel expense by (1-(1/(1+1)))=1/2 is used. In other words, business trip expenses are reduced by half.
For example, if the number of properties to be maintained on the maintenance day is 2, the amount obtained by multiplying the travel expense by (1-(1/(2+1)))=2/3 is used. In other words, business trip expenses are reduced by 1/3.

After recalculating the maintenance cost, the maintenance cost calculation unit 23 adds 1 to the variable n and returns the process to step S23.

A specific example of the implementation date determination process according to the first embodiment will be described with reference to FIGS. 6 to 10. 6 to 10 show an example of determining maintenance implementation dates for property 0, property 1, property 2, and property 4 shown in FIG. 4.
In step S21, in the example shown in FIG. 4, as shown in FIG. 6, maintenance costs for each of a plurality of days in the candidate period are calculated for property 1, property 2, and property 4. In step S22, it is assumed that the implementation date is determined in the order of property 0, property 1, property 2, and property 4.

In step S23, selection of the maintenance implementation date for maintenance property X, which is property 0, is accepted. At this time, as shown in FIG. 7, for the maintenance property X, the standard cost is directly shown as the maintenance cost for a plurality of days in the candidate period, and the selection of the maintenance implementation date is accepted. Here, it is assumed that March 21st is selected as the maintenance implementation date. Then, in step S24, a plan is incorporated to dispatch a maintenance worker to maintenance property X on March 21st.
In step S25, it is determined whether the number of selections has reached the maintainable upper limit number for the day selected in step S23. That is, here, it is determined whether the number of selections on 3/21 has reached the maintainable upper limit number. Here, it is assumed that the number of selections on 3/21 has not reached the maintainable upper limit number. Therefore, the process proceeds to step S27. In step S27, it is determined that there is a candidate property Y whose maintenance implementation date has not been determined. Therefore, the process proceeds to step S28. In step S28, as shown in FIG. 8, the travel expenses for March 21st are reduced to 1/2 and the maintenance costs are recalculated for Property 1, Property 2, and Property 4. Then, the process returns to step S23.

In step S23, the maintenance cost for property 1 in FIG. 8 is shown, and selection of a maintenance implementation date for property 1 is accepted. Here, it is assumed that March 24th is selected as the maintenance implementation date. Then, in step S24, a plan is incorporated to dispatch a maintenance worker to property 1 on March 24th.
In step S25, it is determined whether the number of selections has reached the maintainable upper limit number for the day selected in step S23. That is, here, it is determined whether the number of selections of 3/24 has reached the maintainable upper limit number. Here, it is assumed that the number of selections on 3/24 has not reached the maintainable upper limit number. Therefore, the process proceeds to step S27. In step S27, it is determined that there is a candidate property Y whose maintenance implementation date has not been determined. Therefore, the process proceeds to step S28. In step S28, as shown in FIG. 9, the travel expenses for 3/24 are reduced to 1/2 and the maintenance costs are recalculated for property 2 and property 4. Then, the process returns to step S23.

In step S23, the maintenance cost for property 2 in FIG. 9 is shown, and selection of a maintenance implementation date for property 2 is accepted. Here, it is assumed that March 21st is selected as the maintenance implementation date. Then, in step S24, a plan is incorporated to dispatch a maintenance worker to property 2 on March 21st.
In step S25, it is determined whether the number of selections has reached the maintainable upper limit number for the day selected in step S23. That is, here, it is determined whether the number of selections on 3/21 has reached the maintainable upper limit number. Here, it is assumed that the number of selections on 3/21 has not reached the maintainable upper limit number. Therefore, the process proceeds to step S27. In step S27, it is determined that there is a candidate property Y whose maintenance implementation date has not been determined. Therefore, the process proceeds to step S28. In step S28, as shown in FIG. 10, for property 4, the travel expenses for 3/21 are reduced to 1/3, and the maintenance expenses are recalculated. Then, the process returns to step S23.

In step S23, the maintenance cost for the property 4 in FIG. 10 is shown, and selection of the maintenance implementation date for the property 4 is accepted. Here, it is assumed that March 21st is selected as the maintenance implementation date. Then, in step S24, a plan is incorporated to dispatch a maintenance worker to property 4 on March 21st.
In step S25, it is determined whether the number of selections has reached the maintainable upper limit number for the day selected in step S23. That is, here, it is determined whether the number of selections on 3/21 has reached the maintainable upper limit number. Here, it is assumed that the number of selections on 3/21 has reached the maintainable upper limit number. Therefore, the process proceeds to step S26. In step S26, 3/21 is excluded from the dates that can be selected as maintenance implementation dates. Then, in step S27, it is determined that there is no candidate property Y for which the maintenance implementation date has not been determined. Therefore, the process ends.

***Effects of Embodiment 1***
As described above, the maintenance planning support device 10 according to the first embodiment calculates the maintenance cost by subtracting the residual value of the target part from the standard cost.
This makes it possible to reduce economic losses caused to customers due to preventive maintenance. As a result, maintenance plans based on preventive maintenance will be more easily accepted by customers. As preventive maintenance is accepted by customers, the number of emergency responses will be reduced. Therefore, it becomes easier to formulate an efficient maintenance plan. This also makes it possible to reduce personnel costs and transportation costs for travel time associated with maintenance.

Furthermore, the maintenance plan support device 10 according to the first embodiment reduces the maintenance cost for the same day as the maintenance date of another property.
This makes it easier for the customer to select the maintenance date for another property as the maintenance date. As a result, many maintenance tasks on the same side are likely to be set on the same day. Therefore, it becomes easier to formulate an efficient maintenance plan.

The effects of the maintenance planning support device 10 according to the first embodiment will be described in detail with reference to FIGS. 11 and 12.
The advantages and disadvantages of conventional preventive maintenance and emergency response will be explained with reference to FIG.
For customers, one of the benefits of preventive maintenance is that downtime can be minimized. On the other hand, an advantage of sudden response is that maintenance fees can be minimized. A disadvantage of preventive maintenance is that maintenance fees can be high. In other words, there is a disadvantage that the residual value for the remaining life will be discarded. A disadvantage of sudden response is that the outage period may be extended.
On the maintenance side, one of the benefits of preventive maintenance is that it allows for planned responses, which can reduce maintenance costs. There is no benefit to sudden responses. Preventive maintenance has no disadvantages. A disadvantage of sudden response is that it may require immediate response. In other words, when a failure occurs, sudden parts arrangement and schedule adjustments are required. Additionally, a disadvantage of sudden response is that maintenance costs may be high because a planned response is not possible. Specifically, business trip expenses will increase. Additionally, a disadvantage of sudden response is that customer dissatisfaction may increase due to delays in response.

With reference to FIG. 12, the advantages and disadvantages of preventive maintenance and emergency response when the maintenance planning support device 10 according to the first embodiment is introduced will be described. Here, differences from FIG. 11 will be explained.
For customers, the benefit of preventive maintenance is that in addition to minimizing downtime, parts can be replaced before failure at the same cost as emergency response. There is no benefit to sudden responses. Preventive maintenance has no disadvantages. The disadvantages of responding to sudden emergencies are the same as those shown in FIG.
On the maintenance side, a disadvantage of preventive maintenance is that income may be reduced by reducing maintenance costs by the residual value. The rest is the same as FIG. 11.

In this way, by introducing the maintenance planning support device 10 according to the first embodiment, it becomes desirable for the customer side to introduce preventive maintenance rather than emergency response. As a result, maintenance plans based on preventive maintenance are more easily accepted by customers.

***Other configurations***
<Modification 1>
In the first embodiment, the maintenance planning support device 10 is configured as one device. However, a configuration may also be adopted in which some of the functional components of the maintenance planning support device 10 are realized by a server on the cloud, and the rest are realized by a client terminal. In this case, the maintenance planning support device 10 becomes a maintenance planning support system composed of a plurality of devices.
Furthermore, the device status information 31, customer information 32, and parts information 33 stored in the storage 13 may be stored in an external database. In this case as well, the maintenance planning support device 10 becomes a maintenance planning support system composed of a plurality of devices.

In the first embodiment, each functional component is realized by software. However, as a first modification, each functional component may be realized by hardware. Regarding this first modification, differences from the first embodiment will be explained.

With reference to FIG. 13, the configuration of the maintenance planning support device 10 according to Modification 1 will be described.
When each functional component is realized by hardware, the maintenance planning support device 10 includes an electronic circuit 15 instead of the processor 11, memory 12, and storage 13. The electronic circuit 15 is a dedicated circuit that realizes the functions of each functional component, the memory 12, and the storage 13.

The electronic circuit 15 may be a single circuit, a composite circuit, a programmed processor, a parallel programmed processor, a logic IC, a GA, an ASIC, or an FPGA. GA is an abbreviation for Gate Array. ASIC is an abbreviation for Application Specific Integrated Circuit. FPGA is an abbreviation for Field-Programmable Gate Array.
Each functional component may be realized by one electronic circuit 15, or each functional component may be realized by being distributed among a plurality of electronic circuits 15.

<Modification 2>
As a second modification, some of the functional components may be realized by hardware, and other functional components may be realized by software.

The processor 11, memory 12, storage 13, and electronic circuit 15 are referred to as a processing circuit. That is, the functions of each functional component are realized by the processing circuit.

Further, "unit" in the above description may be read as "circuit", "step", "procedure", "process", or "processing circuit".

The embodiments and modifications of the present disclosure have been described above. Some of these embodiments and modifications may be implemented in combination. Moreover, any one or some of them may be partially implemented. Note that the present disclosure is not limited to the above embodiments and modifications, and various changes can be made as necessary.

10 maintenance planning support device, 11 processor, 12 memory, 13 storage, 14 communication interface, 15 electronic circuit, 21 target detection unit, 22 candidate selection unit, 23 maintenance cost calculation unit, 24 implementation date selection unit, 25 candidate extraction unit, 26 residual value calculation section, 27 business trip cost calculation section, 28 candidate exclusion section, 31 equipment status information, 32 customer information, 33 parts information.

Claims (10)

a candidate extraction unit that extracts one or more candidate properties based on a distance from a route from a departure point to the maintenance property, with a property having a maintenance part that requires maintenance work as a maintenance property;
a residual value calculation unit that calculates the residual value of the target part from the remaining life of the target part, which is a part to be maintained in the target candidate property, for each of the one or more candidate properties extracted by the candidate extraction unit; and,
A maintenance plan support device comprising: a maintenance cost calculation unit that calculates maintenance costs for the target candidate property by subtracting the residual value calculated by the residual value calculation unit from the standard cost. 2. The maintenance cost calculation unit further subtracts a part of the cost of a business trip to the target candidate property from the standard cost to calculate the maintenance cost on the day when maintenance is performed at the maintenance property. Maintenance planning support device. The residual value calculation unit calculates the residual value on the target date from the remaining life on the target date for each of a plurality of days in a candidate period based on the date when the remaining life of the maintenance part expires. ,
The maintenance plan support device according to claim 1 or 2, wherein the maintenance cost calculation unit calculates the maintenance cost on the target date by subtracting the residual value on the target date from the standard cost. The maintenance planning support device further includes:
4. The maintenance plan support device according to claim 3, further comprising an implementation date selection unit that indicates the maintenance cost for each of the plurality of days and accepts selection of a maintenance implementation date for the target candidate property. The implementation date selection unit receives the selection of the maintenance implementation date by sequentially indicating the maintenance cost for each of the plurality of days for each of the one or more candidate properties,
When the selection of the maintenance implementation date is received by the implementation date selection unit, the maintenance cost calculation unit further subtracts a part of the business trip cost to the target candidate property from the standard cost, and determines the maintenance implementation date. 5. The maintenance plan support device according to claim 4, wherein the maintenance cost for each day is recalculated. The maintenance plan support according to claim 5, wherein the maintenance cost calculation unit uses, as part of the business trip cost, an amount obtained by multiplying the business trip cost by a ratio according to the number of properties to be maintained on the maintenance date. Device. The maintenance planning support device further includes:
2. The method according to claim 1 , further comprising a candidate exclusion unit that excludes, from the one or more candidate properties, an excluded property whose residual value for the target candidate property is higher than a business trip cost to the target candidate property. maintenance planning support device. The computer extracts one or more candidate properties based on the distance from the route from the departure point to the maintenance property, with the property having maintenance parts that require maintenance work as the maintenance property;
a computer, for each of the one or more candidate properties, calculates the residual value of the target part from the remaining life of the target part, which is a part to be maintained in the target candidate property;
A maintenance plan support method, wherein a computer subtracts the residual value from the standard cost to calculate the maintenance cost for the target candidate property. Candidate extraction processing that extracts one or more candidate properties based on the distance from a route from a departure point to the maintenance property, with a property having a maintenance part that requires maintenance work as a maintenance property;
Residual value calculation processing for each of the one or more candidate properties extracted by the candidate extraction process, for calculating the residual value of the target part from the remaining life of the target part that is a part to be maintained in the target candidate property. and,
A maintenance plan that causes a computer to function as a maintenance plan support device that performs a maintenance cost calculation process that calculates a maintenance cost for the target candidate property by subtracting the residual value calculated by the residual value calculation process from the standard cost. Support program. a candidate extraction unit that extracts one or more candidate properties based on a distance from a route from a departure point to the maintenance property, with a property having a maintenance part that requires maintenance work as a maintenance property;
a residual value calculation unit that calculates the residual value of the target part from the remaining life of the target part, which is a part to be maintained in the target candidate property, for each of the one or more candidate properties extracted by the candidate extraction unit; and,
A maintenance plan support system comprising: a maintenance cost calculation unit that calculates maintenance costs for the target candidate property by subtracting the residual value calculated by the residual value calculation unit from the standard cost.

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