US-12619218-B2 - Use resource setting method and use resource setting device

US12619218B2US 12619218 B2US12619218 B2US 12619218B2US-12619218-B2

Abstract

A use resource setting device includes a control unit and a storage unit. The storage unit holds resource type information, work time information, and production plan information. A use resource setting method includes the control unit predicting calculation accuracy of required time of work in a use resource plan in which one or more resources are allocated to work in each process of producing the product, based on the resource type information, the work time information, and the production plan information, and, predicting an evaluation index for producing the product when the use resource plan is adopted, based on the use resource plan, the work time information, and the production plan information. The predicting of the evaluation index includes predicting a variation in the evaluation index based on the calculation accuracy of the required time of the work in the use resource plan by the control unit.

Inventors

Takeru DOAN
Norisuke FUJII
Koichi Hattori

Assignees

Hitachi Systems, Ltd.

Dates

Publication Date: 20260505
Application Date: 20231018
Priority Date: 20221020

Claims (7)

1 . A use resource setting method performed by a use resource setting device including a control unit and a storage unit, in which the storage unit holds resource type information, work time information, and production plan information, the resource type information includes information specifying a type of each resource allowed to be used for work of a process of producing a product, the work time information includes information indicating required time of work performed in the past by using each resource, and the production plan information includes information indicating the number of products planned to be produced, the use resource setting method comprising: by the control unit, predicting calculation accuracy of required time of work in a use resource plan in which one or more resources are allocated to work in each process of producing the product, based on the resource type information, the work time information, and the production plan information; and by the control unit, predicting an evaluation index for producing the product when the use resource plan is adopted, based on the use resource plan, the work time information, and the production plan information, wherein the predicting of the evaluation index includes predicting a variation in the evaluation index based on the calculation accuracy of the required time of the work in the use resource plan by the control unit, wherein the predicting of the calculating accuracy and the predicting of the evaluation index are performed for each of a plurality of use resource plans, and the use resource setting method further comprises selecting one of the plurality of use resource plans according to a predetermined selection criterion based on the evaluation index by the control unit wherein in the selecting, when information designating any one of a plurality of selection criteria is input, the control unit selects the one of the plurality of use resource plans according to the designated selection criterion, and wherein the plurality of selection criteria is any one of a criterion that the evaluation index not including a variation based on calculation accuracy of required time for work in the use resource plan is the highest, a criterion that an upper limit value of a range of a variation of the evaluation index is the highest, and a criterion that a lower limit value of the range of the variation of the evaluation index is the highest.
2 . The use resource setting method according to claim 1 , wherein the storage unit further holds use resource information, the use resource information includes information specifying one or more resources allowed to be used for work of a process for each process of producing the product, the use resource setting method further comprises generating a plurality of use resource plans based on the use resource information by the control unit, and the predicting of the calculating accuracy and the predicting of the evaluation index are performed for each of the plurality of use resource plans generated in the generating.
3 . The use resource setting method according to claim 1 , further comprising: by the control unit, outputting information for displaying a result of predicting the variation in the evaluation index on a screen.
4 . The use resource setting method according to claim 1 , wherein in the predicting of the calculation accuracy, the control unit learns a relationship between the number of records of the work and calculation accuracy of a required time for the work for each type of the resource based on the resource type information and the work time information, predicts the number of records of work to be performed in the future in the resource allocated to each process based on the use resource plan and the production plan information, determines the type of the resource allocated to each process based on the use resource plan and the resource type information, and predicts the calculation accuracy of the required time for work in the use resource plan by applying a prediction result of the number of records of the work and a determination result of the type of the resource to the learned relationship between the number of records of the work and the calculation accuracy of the required time for the work for each type of the resource.
5 . The use resource setting method according to claim 4 , wherein the type of the resource includes at least an automated facility that performs work without human intervention, and other types.
6 . The use resource setting method according to claim 1 , wherein in the predicting of the calculation accuracy, when information designating any resource is input, the control unit predicts calculation accuracy of required time for work in the use resource plan including allocation of the designated resource to the work.
7 . A use resource setting device comprising: a control unit; and a storage unit that holds resource type information, work time information, and production plan information, wherein the resource type information includes information specifying a type of each resource allowed to be used for work of a process of producing a product, the work time information includes information indicating required time of work performed in the past by using each resource, the production plan information includes information indicating the number of products planned to be produced, and the control unit predicts calculation accuracy of required time of work in a use resource plan in which one or more resources are allocated to work in each process of producing the product, based on the resource type information, the work time information, and the production plan information, predicts an evaluation index for producing the product when the use resource plan is adopted, based on the use resource plan, the work time information, and the production plan information, and predicts a variation in the evaluation index based on the calculation accuracy of the required time of the work in the use resource plan by the control unit, wherein the predicting of the calculating accuracy and the predicting of the evaluation index are performed for each of a plurality of use resource plans, and the use resource setting method further comprises selecting one of the plurality of use resource plans according to a predetermined selection criterion based on the evaluation index by the control unit wherein in the selecting, when information designating any one of a plurality of selection criteria is input, the control unit selects the one of the plurality of use resource plans according to the designated selection criterion, and wherein the plurality of selection criteria is any one of a criterion that the evaluation index not including a variation based on calculation accuracy of required time for work in the use resource plan is the highest, a criterion that an upper limit value of a range of a variation of the evaluation index is the highest, and a criterion that a lower limit value of the range of the variation of the evaluation index is the highest.

Description

CLAIM OF PRIORITY The present application claims priority from Japanese patent application JP 2022-168238 filed on Oct. 20, 2022, the content of which is hereby incorporated by reference into this application. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for setting a use resource in a production process, the technique achieving both update accuracy and production efficiency at the time of automatically updating work time by utilizing a production record. 2. Description of the Related Art In modeling of work time utilizing the production record, when the number of candidates for usable manufacturing resources is large, the number of records per resource decreases, and the accuracy of the work time decreases. As a result, various indexes (production KPIs) related to production efficiency decrease as compared with those at the time of planning. On the other hand, when the number of resources is small, it is not possible to make a plan with a favorable production KPI. JP 2010-238085 A discloses “a production information management system that connects a data collection system and a screen display system via a network and manages information such as a key performance indicator (KPI), the information serving as an evaluation index of productivity and reliability in a production system”. SUMMARY OF THE INVENTION In the modeling of work time utilizing the production record, a method in which use resources are set in advance at the time of designing a new product, and the work time is automatically updated by collecting/analyzing a work record for each resource available in each process after starting mass production is effective. In setting of the use resource, as the number of set resources increases, the update accuracy of the work time decreases, but the KPI in planning improves. Conversely, as the number of resources is reduced, the update accuracy of the work time is improved, but the KPI at the time of planning is decreased. Furthermore, as the update accuracy of the work time becomes smaller, the possibility that the production KPI deviates from the KPI in planning and decreases becomes higher. Therefore, it is a problem to set a use resource in consideration of the update accuracy of work time and a prediction value including the variation in the production KPI at the same time, at the time of designing a new product. In order to solve at least one of the above problems, the present invention provides a use resource setting method performed by a use resource setting device. The use resource setting device includes a control unit and a storage unit, and in which the storage unit holds resource type information, work time information, and production plan information, the resource type information includes information specifying a type of each resource allowed to be used for work of a process of producing a product, the work time information includes information indicating required time of work performed in the past by using each resource, and the production plan information includes information indicating the number of products planned to be produced. The use resource setting method includes, by the control unit, predicting calculation accuracy of required time of work in a use resource plan in which one or more resources are allocated to work in each process of producing the product, based on the resource type information, the work time information, and the production plan information, and, by the control unit, predicting an evaluation index for producing the product when the use resource plan is adopted, based on the use resource plan, the work time information, and the production plan information. The predicting of the evaluation index includes predicting a variation in the evaluation index based on the calculation accuracy of the required time of the work in the use resource plan by the control unit. According to one aspect of the present invention, it is possible to set a use resource in consideration of the update accuracy of work time and a prediction value including the variation in the production KPI at the same time, at the time of designing a new product. Objects, configurations, and effects other than those described above will be clarified by the descriptions of the following embodiments. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram illustrating an example of a system configuration according to a first embodiment; FIG. 2 is a block diagram illustrating an example of a hardware configuration for realizing a system in the first embodiment; FIG. 3 is a block diagram illustrating an example of an actual use form of an information terminal that realizes the system in the first embodiment; FIG. 4 is an explanatory diagram illustrating an example of a new product use resource information storage unit held in an information storage unit of a use resource setting device in the first embodiment; FIG. 5 is an explanatory diagram illustrat