JPH02130678A - Manufacture plan preparing device - Google Patents

Abstract

PURPOSE:To prepare the manufacture plan of high reliability in a short time by determining a starting order in an attention process, next, determining strategy based on input strategy and the starting order, executing the simulation of the strategy and evaluating a simulated result. CONSTITUTION:Based on input strategy 13, a starting order 14 of a job, which is instructed by a manufacture plan 8, is determined to the attention process such as the process going to be a problem. An equipment allocation determined result to be determined by an equipment allocation determination rule 10 is registered to a basic information 7 and a dispatching rule determined result is registered to the information 7. A simulation means 4 refers to the informa tion 7 and develops the starting order 14 along a time base. Then, the simulation of all the processes in a production system and a manufacture plan 15 is outputted. In an evaluating means 5, the information 7 and strategy 13 are referred to the outputted plan 15 and the plan 15 is evaluated according to an evaluation rule 12 by an evaluation index based on the strategy 13. After that, an evaluated result is outputted.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a manufacturing planning device, and in particular, to an apparatus for automatically determining the order of job submission to improve production efficiency for a production plan for a wide variety of jobs given by a host system. The present invention relates to a manufacturing plan creation device that creates a manufacturing plan.

[Conventional technology]

Conventional manufacturing planning devices create operational rules such as start and stop conditions, exclusive conditions, etc. for each process, each piece of equipment in the target production system, or between multiple local processes or multiple pieces of equipment, or jobs in each process. The system includes a rule registration means for registering priority input rules as rules in advance, and a simulation means for performing a simulation while applying the rules to an input production plan and outputting a manufacturing plan.

[Problem to be solved by the invention]

The conventional manufacturing planning device described above can obtain a good order of job input between local processes, but how does it contribute to the goal of improving the production efficiency of the entire production system? Therefore, when an efficient manufacturing plan cannot be obtained, it is difficult to obtain the reason or guidelines for creating an alternative plan.

In addition, for production systems where the production volume, the number of products produced, and the quantity ratio of each product described in the production plan given by the upper system fluctuates considerably, the bottleneck process changes accordingly. There has been a problem in that simply applying rules to equipment or jobs makes it difficult to create a manufacturing plan that improves the efficiency of the flow of jobs throughout the production system and the efficient use of equipment.

[Means to solve the problem]

The manufacturing planning device of the present invention refers to basic information including product information, process information, and production work-in-progress information and input order determination rules, determines an input strategy for an input production plan, and determines an input strategy for a target production system. a production system by referring to the input strategy and the production procedure of the production procedure determination means, the basic information, and the equipment allocation decision rule; equipment allocation determining means for determining the allocation of product types of jobs that can be processed to equipment in the equipment; referring to the input strategy and arrival procedure of the arrival procedure determining means; the basic information; and the dispatching rule determination rule; Equipment and workers within the production system;
a dispatching rule determining means that determines the dispatching of the stuck job in the jig/inter-process buffer; a simulation means for developing the wearing procedure of the wearing procedure determining means along the time axis, simulating the entire process, and outputting a manufacturing plan; It is configured to include an evaluation means for evaluating the manufacturing plan of the simulation means against the input strategy, and a judgment means for displaying and changing each output result of each of the above-mentioned means.

〔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 starting to create a manufacturing plan, basic information 7 including product information, process information, and production in-process information regarding the target production system is registered in advance. In addition, rule 9 for determining the order of input. Equipment allocation decision rule 10.
Dispatching rule determination rule 11. and evaluation rules 12 are rules that organize on-site management know-how suitable for the operation of the target production system, and are registered in advance. The production plan 8 is given by the host system and registered in advance.

The arrival procedure determining means 1 refers to the basic information 7 and the production plan 8, looks over the entire target process according to the arrival procedure determination rule 9, and determines the input strategy 13. Then, based on the input strategy 13, a job loading procedure 14 instructed by the production plan 8 is determined for the process of interest such as a bottleneck process.

Next, in the equipment allocation means 2, input strategy 13° arrival procedure 14. and basic information 7, equipment allocation decision rule 1
0, the allocation of product types for jobs that can be processed to each facility in the production system is determined based on the number of product types to be produced and the quantity ratio of each type. The equipment allocation determination result is registered in the basic information 7.

Furthermore, in the dispatching rule determining means 3,
Input strategy 132 With reference to arrival procedure 14 and basic information 7, dispatching regarding equipment, workers, jigs in the production system, and jobs held in the inter-process buffer is determined by dispatching rule determination rule 11. The dispatching rule determination result is registered in the standard information 7.

Based on the above determination results, the simulation means 4 refers to the basic information 7, develops the arrival procedure 14 along the time axis, simulates all the processes in the production system, and outputs the manufacturing plan 15. And evaluation means 5
, the basic information 7 and the input strategy 13 are referred to, and the evaluation rule 12 is used for the outputted manufacturing plan 15.
The manufacturing plan 15 is evaluated using an evaluation index based on the input strategy 13, and an evaluation result 16 is output.

In the judgment means 6, if the manufacturing plan 15 is not appropriate, the fitting procedure determination means 1. Equipment allocation determining means 2. Each intermediate result outputted by the dispatching rule determining means 3 is changed and the plan is re-planned.

Next, the processing procedure in each means will be explained in more detail.

FIG. 2, FIG. 3, and FIG. 4 are explanatory diagrams of product information, process information, and production progress information included in the basic information 7. Second
The product information shown in the figure includes the number of processes and process steps required to produce each product type, as well as the processing time in each process,
Information such as setup change time, operator name or jig name if a worker or jig is required is described.

The process information shown in Figure 3 includes the number of equipment and equipment names that can be used in each process, the operating time of each equipment, the relative equipment capacity compared to other equipment in the same process, and the names of the types of products that can be processed. Information such as this is described.

The production in-process information shown in Figure 4 includes information such as the name of the lot in progress in each process in the production system, the product name, quantity, delivery date, priority, and name of the process in progress for each lot. It has been described. FIG. 5 is an explanatory diagram of the production plan 8 given by the host system, in which the name of the lot to be produced now, and information such as the product name, quantity, delivery date, and priority for each lot are described.

The arrival procedure determining means 1 refers to the basic information 7 and the production plan 8 as described above, and determines the input strategy 13 and the arrival procedure 14 based on a plurality of pre-registered arrival procedure determination rules 9.
There are two types of 0-place procedure determining rules 9: rules for determining the throwing strategy 13 and rules for determining the 0-place procedure 14. FIG. 6 is an explanatory diagram showing an example of a rule for determining the investment strategy 13. The arrival procedure determination rule RAI included in the arrival procedure determination rule 9 is the process 2 of the production plan 8.
The focus is on three items: the process load, the total number of input products, and the number of lots with priority 1. If, as a result of calculating the above three items, all three items are larger than a certain value, then as a subsequent input strategy, firstly, reduce the number of setup changes, and secondly, create a priority plan that prioritizes securing delivery dates. Select strategy T1.

FIGS. 7(a) and 7(b) are explanatory diagrams showing an example of a rule for determining a landing procedure based on a determined throwing strategy. The arrival procedure determination rules R and B 1 included in the arrival procedure determination rule 9 are such that when the input strategy T1 is selected,
For each lot in production plan 8, first, place the lot with priority 1 at the beginning of the loading procedure, second, groove with the same product type, and third, select the product type so that the setup change time in process 2 is minimized. This shows that the delivery procedure is determined by rearranging the groups and, fourthly, rearranging the order of lots within the product group in descending order of lead time margin.

In addition, the delivery procedure determination rule RB2 included in the delivery procedure determination rule 9 takes into consideration the delivery procedure determined by the delivery procedure determination rule RBI, and if the number of lots with tight delivery margins is greater than a certain value, , indicates that the created delivery procedure will be changed so that lots with tight deadlines are brought forward. FIG. 8 is an explanatory diagram of the arrival procedure 14 obtained as a result of rearranging the order of lots in the production plan 8 of FIG.

Next, in the equipment allocation determining means 2, the input strategy 1.3° arrival procedure 14. With reference to the basic information 7 and the equipment allocation determination rule 10, the allocation of product types of jobs that can be processed to each equipment in the production system is determined. FIG. 9 is an explanatory diagram showing an example of the equipment allocation determination rule 10. An example of the equipment allocation decision rule RCI is that if the input strategy T1 is selected, there are multiple equipment in a certain process, and the ratio of the average setup change time to the process processing time is greater than a certain value, then the process This indicates that the equipment will be converted into a dedicated machine and operated. FIG. 10 is an explanatory diagram showing the equipment allocation determination result by affirmative (Y) and negative (N) in the application column. In the process information shown in Figure 3, both equipment 1 and equipment 2 are registered to be able to process all types of products, but in order to reduce the number of setup changes, the equipment has been specialized and the types that can be processed at each stage have been changed. Limited. This equipment allocation determination result is registered in the standard information 7.

Furthermore, the dispatching rule determining means 3 determines the input strategy 131 and arrival procedure 14. With reference to the basic information 7, dispatching of jobs held in equipment, workers, jigs, and inter-process buffers in the production system is determined in accordance with the dispatching rule determination rule 11. FIG. 11 is an explanatory diagram showing an example of a dispatching rule determination rule for selecting retained lots in the inter-process buffer. Dispatching rule determination rule RD1 is a method to first reduce the number of setup changes and then secure the delivery date when input strategy T1 is selected, there are multiple facilities in a certain process, and the process load is greater than a certain value. In this process, dispatching is applied that firstly gives priority to lots with a high priority, secondly gives priority to lots with a short setup change time, and thirdly gives priority to lots with a small margin for delivery. ing.

FIG. 12 is an explanatory diagram showing the dispatching rule determination results. The dispatching rule determination result is registered in the standard information 7.

In the simulation means 4, the entire process is simulated based on the above determination results, and as a result, a manufacturing plan]5 is output. FIG. 13 is an explanatory diagram of a lot-by-lot manufacturing plan that describes the start time and end time of each lot in each process.

The evaluation means 5 evaluates the output manufacturing plan 15 according to evaluation rules 12 and outputs evaluation results 16.

FIG. 14 is an explanatory diagram showing an example of the evaluation rule. The evaluation rule REI that constitutes the evaluation rule 12 is based on the input strategy T.
If 1 is selected, the number of setup changes, delivery date guarantee rate,
This indicates that the three evaluation indicators of the average number of work in progress are evaluated using a weighting ratio of 7:2:1. FIG. 15 shows the evaluation results. In this example, the evaluation score and reference data such as the number of setup changes, delivery date guarantee rate, average number of work in process, and average lead time are calculated and described.

In the judgment means 6, if the manufacturing plan] 5 is not appropriate, this device or the operator determines the arrival procedure determination result in Figure 8, the equipment allocation determination result in Figure 10, and the dispatching rule determination result in Figure 12. Make changes and replan.

〔Effect of the invention〕

The manufacturing planning device of the present invention first establishes a rough input strategy that looks over the entire production system according to the progress status of the production plan and production system, determines the implementation procedure for the process of interest, and then Determine detailed strategies such as equipment allocation and job dispatching based on the process and arrival procedure, perform simulations, and evaluate the simulation results to ensure highly reliable manufacturing according to the characteristics of the input production plan. This has the effect of allowing you to create a plan in a short amount of time.

In addition, by incorporating field operation management know-how specific to the target production system as rules, it is possible to create a manufacturing plan for each target. Furthermore, if the expected manufacturing plan is not obtained, the system or operator can be evaluated by presenting the strategies of arrival procedure determination results, equipment allocation determination results, and dispatching rule determination results to this equipment or operator. This has the effect that each of the above strategies can be changed to create alternative plans while referring to the results and replanning can be done relatively easily.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing the configuration of an embodiment of the present invention, Fig. 2 is an explanatory diagram of product information, Fig. 3 is an explanatory diagram of process information,
Fig. 4 is an explanatory diagram of production in-process information, Fig. 5 is an explanatory diagram of production planning, Fig. 6 and Figs. 7 (a) and (b) are explanatory diagrams showing an example of arrival procedure determination rules, and Fig. 8 is an explanatory diagram of production process information. FIG. 9 is an explanatory diagram showing an example of the equipment allocation determination rule. FIG. 10 is an explanatory diagram of the equipment allocation result. FIG. 11 is an explanatory diagram showing an example of the dispatching rule determination rule. , FIG. 12 is an explanatory diagram of the dispatching rule determination result, FIG. 13 is an explanatory diagram of the manufacturing plan, FIG. 14 is an explanatory diagram showing an example of the evaluation rule, and FIG. 15 is an explanatory diagram of the evaluation result. 1... Arrival procedure determining means, 2... Equipment allocation determining means,
3... Dispatching rule determining means, 4... Simulation means, 5... Evaluation means, 6... Judgment means, 7... Basic information, 8... Production planning, 9...
Arrival procedure determination rule, 10...Equipment allocation determination rule, 1
1...Dispatching rule determination rule, 12...
- Evaluation rules, 13... Input strategy, 14... Arrival procedure, 15... Manufacturing plan, 16... Evaluation results.

Claims (1)

[Claims] By referring to basic information including product information, process information, and production in-process information and input order determination rules, an input strategy is determined for the input production plan, and one part of the target production system is determined. A placement procedure determining means for determining a job placement procedure in one or more specific processes; equipment allocation determining means that determines the allocation of product types for jobs that can be processed to equipment, workers,
a dispatching rule determining means that determines the dispatching of the stuck job in the jig/inter-process buffer; a simulation means for developing the wearing procedure of the wearing procedure determining means along the time axis, simulating the entire process, and outputting a manufacturing plan; 1. A manufacturing plan creation device comprising: evaluation means for evaluating a manufacturing plan of a simulation means with respect to an input strategy; and judgment means for displaying and changing each output result of each of the means.