JPH0373257A - Production scheduling device - Google Patents

Abstract

PURPOSE:To provide an efficient plant simply, by extracting and editing the data of a plan information description portion in agreement with the execution form of a load estimate simulation portion, and estimating a work center load on the basis of that data. CONSTITUTION:A load estimate simulation portion 9, in agreement with its execution form, extracts from files 2-5 the data of the information of products, the information of work by work centers, the information of factories and the information of planning, and conducts editing at an editing portion 7, and a work center load is estimated on the basis of the editing data file 8. Next, appraisal is made at an appraisal and decision portion 13, and if necessary, renewal processing is made at a renewal processing portion 22, and the estimate of the load is conducted again by doing re-editing at a re-editing portion 16, and a load estimate simulation outcome is indicated at an indicting portion 12 through a load outcome editing portion 11. Thus, an efficient work structure and overtime work plan and manufacture plan by work centers can be made out simply in a short time.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is a production scheduling device, particularly in a production factory where there are multiple products with different process procedures, processing times, etc. depending on the product. The present invention relates to a production scheduling device for automatically creating a suitable work system, overtime plan, and manufacturing plan.

[Conventional technology]

In conventional production scheduling systems, work instructions are normally given by a person in charge of process progress after confirming the production that is stagnant at each work center (equipment group), and work instructions are given only immediately before the start of production. I didn't know whether it would be better to work overtime or not. In addition, scheduling was performed using large-scale electronic computers, and the results were used directly as manufacturing plans.

[Problem to be solved by the invention]

In the conventional manual production scheduling described above,
Only partial solutions do not provide the fundamental solution. For example, since scheduling is done after confirming the stagnation of a limited number of processes, the balance between processes and long-term periods cannot be considered, and overtime plans can only be made for a few days. It was not possible to review plans, work systems, personnel, etc. in advance, resulting in major problems such as delivery delays, idle equipment, and workers.

In addition, in the case of methods using large-scale computers, although the automatically determined results are not necessarily the optimal results, they must be used as is unless there is a significant change in personnel. I had to.

[Means to solve the problem]

The production scheduling device of the present invention includes a plan information description section that stores input types, quantities, and delivery dates given from an upper schedule planning system, a progress information description section that stores current progress information regarding the plan, and a production target. A product technology information description section that stores process procedures, assigned equipment, and processing time for each product type; a factory calendar information description section that defines work days for the entire factory; and a work center and overtime schedule for work centers. an editing section that extracts and edits the data in the plan information description section in accordance with the execution format of the load prediction simulation section and stores the data in an edited data storage section; and the edited data storage section. a load prediction simulation unit that predicts the work center load based on the data and stores the data in a load file storage unit; a result display unit that reports the load data to the operator; The evaluation/judgment unit creates information change instruction data and stores it in the evaluation file, and the evaluation file data is
The re-editing section edits the data into a format that is easy to simulate in the load prediction simulation section, and if there is no changed data in the evaluation file data, it executes a detailed simulation that takes into account equipment, time, and capacity, and displays the simulation results in the simulation results section. The detailed simulation unit stores the data, and the result display unit reports the data of the simulation results obtained by the simulation unit to the operator as a work instruction.

〔Example〕

Next, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention. Before scheduling, the operator registers necessary information in each of the product information file 2, work center work information file 3, and factory information file 4 through the input terminal 1. The plan information file 5 is
Information is registered through the input terminal 1 or an interface with another system 6.

Let us take as an example the process procedure shown in Fig. 2 (i.e., product a is manufactured through sequential processes in work centers 1 to 4, and product A is manufactured through processes in work centers l and 3). and product information file 2
For each product, information such as the type of process corresponding to the process order, the assigned equipment group that specifies the work center required for this process, the processing time, and the setup time is stored in the 7th section.
It is described as shown in the figure.

The work information file 3 for each work center contains the information shown in Figure 8(a).
And as shown in (b), work center information and work information are respectively registered. FIG. 8(a) shows equipment for each work center as work center information.
In FIG. 8(b), information such as shift system, overtime, and vacation schedule is described for each work center as work information.

Further, in the factory information file 4, data on holidays and working days is written in a calendar format as shown in FIG. 9. Furthermore, as shown in FIG. 10, the plan information file 5 describes plans such as manufacturing instruction numbers, product types, and quantities, as well as delivery dates for customers and manufacturing start dates.

Next, when executing the simulation, first, the editing section 7 first imports information about the types of input products registered in the planning information file 5 into the product information file 2, work center work information 3, and factory information file. 4 and other systems 6 and edit them, and the results are stored in the edited data file 8. Thereafter, the load prediction simulation unit 9 performs a simulation based on the work schedule and processing time data without considering the capacity of the work center that processes each J-type process, and as shown in FIG. Data such as processing time and sorting or daily load for each work center are determined and written to the load file 10. Here, t1 to t4 indicate processing times of work centers 1 to 4, respectively.

Next, the evaluation processing unit 13 reviews the work system for the next month or creates an overtime schedule for one week based on the information in the load file.

The load result editing section 11 edits the various information in the load file 10 and the evaluation file 14 into the tables shown in FIGS. Evaluation and judgment are performed again, and if the need arises, maintenance of the evaluation file can be performed from the input terminal 15.

Figure 4 is a diagram showing the burden of selection 1 and presents the currently defined work system (two shifts) and the proposed work system (three shifts).

Furthermore, Figures 5 and 6 are diagrams showing the daily workload, and the overtime hours for each shift are shown.

If the evaluation result is -f=e, and there is change data in the evaluation file, the change data is converted by the data converter 16, a converted data file 17 is created, and the simulation is performed again. This is repeated until the evaluation results indicate that there is no change data in the evaluation file.

Next, the detailed simulation section 18 performs a detailed simulation based on the data in the re-edited data file, taking into account the JOB, assigned equipment, processing time, etc., and also records the data in the simulation result file 19. The simulation results are edited by the simulation result editing section 20, and Gantt charts for each job, Gantt charts for each facility, operation analysis tables for each facility, work instruction tables, etc. are displayed on the display section 21.

Next, the update processing unit 22 updates the work center-specific work information based on the data in the final evaluation file.

The load prediction simulation process is performed using the job JO shown in Figure 3.
This will be explained using B3 as an example.

When the first process of JOB2 is at work center 1, the second process is at work center 2, the third process is at work center 3, and the fourth process is at work center 4, calculate the processing time of each process,
It is added unconditionally in order from the start time of the scheduled input date. At that time, if the work center's work schedule is exceeded, processing will be postponed to the next day. For example, the first process processing time t1 of JOBI falls within the working hours of work center l, but if the second process is subsequently processed, the expected processing completion time will exceed the working hours, so the second process Divide the process into two (processing time t2 = processing time T1 + processing time T2),
Processing is carried out during the working hours (processing time TI), and processing is extended to perform the remaining processing the next day (processing time T2). Such processing is performed for all jobs in the plan information. At that time, the processing time of the work center is selected and totaled by day.

〔Effect of the invention〕

The scheduling method of the present invention provides an efficient work system/overtime plan for each work center that takes into consideration the relationship between processes.
This has the effect of making it possible to easily create a manufacturing plan in a short period of time.

[Brief explanation of drawings]

Figure 1 is a block diagram showing the configuration of an embodiment of the present invention, Figure 2 is an explanatory diagram showing the product process procedure, Figure 3 is an explanatory diagram showing load prediction simulation processing, and Figures 4 and 5 are respectively A display diagram showing load prediction simulation results and their evaluation results, Figure 6 is a display diagram showing a work schedule, and Figure 7 is a display diagram showing the load prediction simulation results and their evaluation results.
The figure is an explanatory diagram showing an example of a process procedure stored in a product information file, and FIGS. 8(a) and (b) each show an example of work center information and its work information registered in a work center-specific information file. FIG. 9 is an explanatory diagram showing a calendar of work days stored in a factory information file, and FIG. 10 is an explanatory diagram showing a manufacturing plan stored in a plan information file. 1.15...Input terminal, 2...Product information file, 3...Work center specific work information file, 4...Factory information file, 5. ...
...Plan information file, 6...Other systems,
7...a eastern part, a...edited data file, 9...load prediction simulation section, 1
0...Load file, 11...Load result editing section, 12...Display section, 13...
Evaluation judgment unit, 14...Evaluation file, 16...
... Re-editing department, 17... Re-editing data file, 18... Detailed simulation L19.
...Simulation result file, 20...
...Result editing section, 21...Display section, 22...
...Update processing section.

Claims (1)

[Claims] Input types, quantities, and information given by the upper-level scheduling system
A plan information description section that stores delivery dates, a progress information description section that stores current progress information regarding the plan, and a product technology information description that stores process procedures, allocated equipment, and processing time for each type of product to be produced. a factory calendar information description section that defines work days for the entire factory; a work center-specific work information description section that stores work schedules and overtime schedules for work centers;
an editing section that extracts and edits data in accordance with the execution format of the prediction simulation section and stores the data in an edited data storage section; and a work center load predicted based on the data in the edited data storage section and stores the data in a load file storage section. a load prediction simulation unit that reports the load data to an operator; a result display unit that evaluates the load data;
an evaluation/judgment unit that creates change instruction data for work information for each work center and stores it in an evaluation file; a re-editing unit that edits the data in the evaluation file again into a format that is easy to simulate in the load prediction simulation unit; and an evaluation file. If there is no change data in the data, a detailed simulation section that executes a detailed simulation that takes into account equipment, time, and possessed capacity and stores the simulation results in the simulation result section, and a detailed simulation section that uses the data of the simulation results from the simulation section as work instructions. A production scheduling device comprising: a result display section for reporting to an operator.