US 5,493,501 AGranted

Production control system selecting optimum dispatching rule

AssigneeNEC Corporation

InventorHiroshi Kondo

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Abstract

A production control system for electron devices manufactured through many stages including plural apparatuses comprises dispatching rule storing means, a statistical analyzer and a simulator. The dispatching rule storing means stores plural dispatching rules including a first-in first-out rule, three of lot selective rules and dead line rule. The statistical analyzer accumulates status data representing the status off each of apparatuses and lots to be processed for a fixed period of time, and generates a statistical data by statistically processing the status data as accumulated. The simulator simulates the production line to evaluate an efficiency thereof based on the statistical data and each one of the plural dispatching rules. An optimum dispatching rule is selected which provides the optimum efficiency for the production line among the plural dispatching rules.

Claims9

Dependent claims

A production control system for a production line including at least one apparatus for each of a plurality of production stages to manufacture lots of products, said production control system comprising:

data collecting means for collecting status data of said at least one apparatus for each of said production stages and data on lots to be processed;
a data analyzer for accumulating said status data for a predetermined period of time to periodically generate a statistical data by statistically processing said status data;
a simulator having at least one simulation model receiving said statistical data for periodically simulating at least a portion of said production line to evaluate an efficiency thereof based on a plurality of dispatching rules;
and dispatching means for selecting an optimum dispatching rule among said plurality of dispatching rules based on the result of the simulation by said simulator to provide a productive instruction data for allocating a lot of product-to-be one of said at least one apparatus based on said optimum dispatching rule.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 08/286,348Filed 5 Aug 1994
Priority: JP 5-1937965 Aug 1993
Granted: 20 Feb 1996
Term ends: Not estimatedThe source records don’t support an estimate.

Classification15 codes

G06Q 10/06
Administration; Management: resources, workflows, human or project management; Enterprise or organisation planning; Enterprise or organisation…
G05B 19/41865
Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible…:…
G05B 2219/31318
From computer integrated manufacturing till monitoring: data analysis, using different formats like table, chart
G05B 2219/31379
From computer integrated manufacturing till monitoring: leader monitors controllers, updates production progress, allocates resources