JPH106189A - Manufacturing shop control method and device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To promote a second look at a dispatching rule by selecting an object to be worked in the next place in real time on the basis of a dispatching rule with every previously evaluated equipment, and displaying an alarm when a difference is made between a preverified result and a job site. SOLUTION: A shop condition searching part 6 searches information on a processable product at present time and information containing work start possible time related to a product in real time with every equipment, and the next processing selecting part 7 determines the next processing object on the basis of a dispatching rule by which information on the shop condition searching part 6 is controlled with every equipment by a rule maintenance part 4. A result comparing part 8 compares a result of a simulation part 5 and a shop condition in real time with each other, and calculates a difference, and the difference being a result of the result comparing part 8 is displayed by an alarm display part 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for controlling a manufacturing shop, and more particularly to a job shop type manufacturing shop for manufacturing a variety of products in which a next work target is to be worked in real time based on a dispatching rule evaluated in advance. The present invention relates to a method and an apparatus for controlling a manufacturing shop which promotes reviewing of dispatching rules again by displaying an alarm when a difference occurs between a simulation result selected and pre-verified and a current state.

[0002]

2. Description of the Related Art In a conventional manufacturing shop control, a work instruction is created by simulation,
The target work of the next process is determined from the workable items by a specific rule.

For example, according to Japanese Patent Application Laid-Open No. 4-304557, a work instruction is issued while appropriately balancing the priority of product delivery and the operation rate of equipment. According to Japanese Patent Application Laid-Open No. 3-161250, a simulation is executed on the basis of various kinds of plan information including the progress of a manufacturing shop and the priority order of waiting lots, and instructions for each operation are efficiently created.

[0004]

As described above, in the conventional manufacturing shop control, the selection of the next processing target in the simulation and the actual work is individually performed, and the next processing target selection rule is changed due to a change in the product mix or the like. Review cannot be performed. Further, it is not possible to recognize whether or not a problem occurs with the rule once determined.

[0005] An object of the present invention is to solve the above-mentioned drawbacks by selecting an object to be next worked in real time based on dispatching rules for each facility evaluated in advance, and comparing the result of pre-verification with the result of on-site inspection. It is an object of the present invention to provide a manufacturing shop control method and apparatus that can promote the review of the dispatching rules by displaying an alarm when a problem occurs, and can follow a change in a product mix or the like.

[0006]

A manufacturing shop control method according to the present invention includes a first step of simulating a job shop type manufacturing shop for manufacturing a variety of products by a simulation model, and the result of the first step. If the evaluation is OK, the dispatching rules managed for each equipment of the manufacturing shop are replaced with those used in the simulation model, and if the evaluation is NG, the second step for instructing the dispatching rule in the simulation model to be reviewed is performed. And a third step of comparing the progress of the manufacturing shop with the result of the first step and instructing to review the dispatching rule in the simulation model if a difference occurs.

Further, the manufacturing shop control device according to the present invention comprises a process flow storage unit for individually storing manufacturing process procedures for all products to be manufactured in a job shop type manufacturing shop for manufacturing a variety of products. A production plan storage unit that stores plan information such as a planned input date and a delivery date for all target products, and a work-in-process state storage unit that stores the current state of the work-in-progress of a manufacturing shop at a specific timing. A rule maintenance unit for designating, changing, and managing a dispatching rule for determining a work sequence for each production facility existing in a manufacturing shop; and a process management method for a production target stored in the production plan storage unit and the in-process state storage unit. Procedures stored in the flow storage unit and dispatching rules for each processing facility managed by the rule maintenance unit A simulation unit that simulates in chronological order based on the production equipment, and information on the spare time, priority, and process flow of the production target that can be currently worked on the relevant equipment at the time of selecting the next work target for each production equipment A shop state search unit that searches for information on workable time, delivery margin, priority, and process flow of a production target that is not in a state but can be worked in the future, and information searched by the shop state search unit. A next processing selection unit that selects a production target to be worked next for each manufacturing equipment based on rules managed by the rule maintenance unit, and a result of comparing the result of the simulation unit with the state of the shop in real time and calculating a difference A comparison unit; and an alarm display unit for displaying the difference calculated by the result comparison unit.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings.

FIG. 1 is an explanatory diagram showing one embodiment of a manufacturing shop control method according to the present invention. In the figure, a manufacturing shop control method according to the present invention provides a simulation unit 1 that replaces an existing manufacturing shop with a simulation model and simulates using the model information.
0, and the result of the simulation unit 10 is evaluated.
If it is, the dispatching rule managed for each of the existing manufacturing shop equipment is replaced with the one used in the simulation model. And an alarm display unit 30 for comparing the progress of the manufacturing shop to be performed with the result of the simulation unit 10 and for reviewing the dispatching rules in the simulation model when a difference occurs.

That is, in the manufacturing shop control method described above, a manufacturing shop is modeled and simulated, and a dispatching rule for determining a work sequence suitable for the model is selected for each production facility existing in the manufacturing shop. Then, in the actual manufacturing phase, the dispatching rules are managed for each production facility, and when the next work target is selected, the next work target is determined using the dispatching rule. Further, when a large change occurs between the simulation result and the actual progress of the manufacturing shop, the dispatching rule is reexamined by the simulation.

FIG. 2 is a block diagram of one embodiment of the manufacturing shop control device according to the present invention. Referring to FIG. 1, a manufacturing shop control device of the present invention includes a process flow storage unit 1 for storing individual manufacturing process procedures for all products to be produced in a job shop type manufacturing shop for producing a variety of products, A production plan storage unit 2 for storing planning information such as a planned input date and a delivery date for all products to be processed, and a work-in-progress state storage unit 3 for storing the current state of a work-in-progress product at a specific timing. And a rule maintenance unit 4 for specifying, changing, and managing dispatching rules for determining a work order for each production facility existing in the manufacturing shop, and a production target stored in the production plan storage unit and the in-process state storage unit. The procedure stored in the process flow storage unit and the dispatching rules for each processing facility managed by the rule maintenance unit And simulation unit 5 that simulates in time series, and information on the margins, priorities, and process flows of the production objects that can be currently worked on the relevant equipment at the time of selecting the next work control for each production equipment, and that work is still possible at this time And a shop state search unit 6 that searches for workable time, delivery margin, priority, and process flow information of a production target that is not in a proper state but can be worked in the future. The next processing selecting unit 7 selects information to be produced next for each manufacturing equipment based on the rule managed by the rule maintenance unit, and compares the result of the simulation unit with the state of the shop in real time to determine the difference. The apparatus includes a result comparison unit 8 for calculation and an alarm display unit 9 for displaying the difference calculated by the result comparison unit.

That is, the above-mentioned manufacturing shop control device is capable of realizing the manufacturing shop information in real time based on the manufacturing procedure information for each product stored in the process flow storage unit 1, the previous production plan information stored in the production plan storage unit 2. The in-process information in the in-process status storage unit 3 that stores the in-process status at a specific point in time, and the dispatching rule that is stored in the rule maintenance unit 4 and is a work object selection rule for each facility. Is used as input information, and the simulation section 5 simulates the future flow of the manufacturing shop.

A shop state search unit 6 searches for information on products that can be processed at the present time and information including a work start time regarding products that can be processed conventionally, for each facility in real time. The next processing target is determined based on the dispatching rules managed by the rule maintenance unit 4 for each piece of information in the shop state search unit 6.

The result comparing unit 8 is provided with the simulation unit 5
The result is compared with the shop status in real time to calculate the difference, and the difference which is the result of the result comparing unit 8 is displayed on the alarm display unit 9.

[0015]

As described above, the manufacturing shop control device of the present invention can be used in a job shop type manufacturing shop for manufacturing a variety of products in the following manner in real time based on dispatching rules for each equipment evaluated in advance. An object to be selected is selected, and if there is a difference between the result of the pre-verification and the current state, an alarm is displayed to facilitate the review of the dispatching rules. Therefore, there is an effect that control can be performed according to the state of the manufacturing shop following changes in the product mix and the like.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing one embodiment of a manufacturing shop control method of the present invention.

FIG. 2 is a block diagram showing one embodiment of a manufacturing shop control device of the present invention.

[Description of Signs] 1 Process flow storage unit 2 Production plan storage unit 3 Work in progress storage unit 4 Rule maintenance unit 5 Simulation unit 6 Shop state search unit 7 Next processing selection unit 8 Result comparison unit 9 Alarm display unit 10 Simulation step 20 Result evaluation step 30 Alarm display step

Claims (2)

[Claims] 1. A first step of simulating a job shop type manufacturing shop for manufacturing a variety of products by a simulation model, and evaluating a result of the first step. Replacing the managed dispatching rules with those used in the simulation model, and in the case of NG, a second step of instructing a review of the dispatching rules in the simulation model; Comparing the result of the step with the result of the step and, if a difference occurs, instructing a review of a dispatching rule in the simulation model. 2. In a job shop type manufacturing shop for manufacturing a variety of products, a process flow storage unit for individually storing manufacturing process procedures for all products to be produced, and introduction schedules for all products to be produced. A production plan storage unit that stores plan information such as date and delivery date, a work state storage unit that stores the current state of work in progress at a specific timing, and a production facility that exists in the manufacturing shop A rule maintenance unit that specifies, changes, and manages a dispatching rule that determines a work order; and a procedure stored in the process flow storage unit with respect to a production target stored in the production plan storage unit and the in-process storage unit. A simulation system for simulating in chronological order based on a dispatching rule for each processing facility managed by the rule maintenance unit. At the time of selecting the next work target for each production facility, information on the delivery margin, priority, and process flow of the work target that can currently work on the relevant equipment, and the work is not yet ready at this time A shop state search unit that searches for workable time, delivery margin, priority, and process flow information of a production target that will be able to work in the future, and information searched by the shop state search unit is managed by the rule maintenance unit A next processing selecting unit for selecting a production target to be worked next for each manufacturing equipment based on the set rules, a result comparing unit for comparing the result of the simulation unit with the state of the shop in real time and calculating a difference, and the result A manufacturing shop control device comprising: an alarm display unit that displays a difference calculated by the comparison unit.