Dynamic dispatching rule that uses long term due date and short

Details Dynamic dispatching rule that uses long term due date and short Dynamic dispatching rule that uses long term due date and short

1995-04-04

1996-08-13

Trammell, James P.

Boots, shoes, and leggings

36446805, G06F 1900

Patent

active

055463266

ABSTRACT:
This is a dynamic dispatching method for delivery performance by a factory. SLACK=(Due.sub.-- Date-Now)-(Forecast.sub.-- FAB.sub.-- Out.sub.-- Time); where Due.sub.-- Date=Scheduled due date from Master Production Schedule. The OTD (On Time Delivery) dynamic dispatching method focuses on the due date and the target cycle time under the environment of integrated circuit manufacturing. SLACK policy controls the long term due date and the OTD policy reflects the short term stage queue time. Through fuzzy theory, SLACK and OTD policies are combined as a dispatching controller to control the lot priority of the entire production line. The work piece, with either a long stage queue time, or with an urgent due date is pushed through the overall production line instead of jamming the front end of the process. A demand pull system satisfies the due date and the quantity of monthly demand.

REFERENCES:
patent: 5093794 (1992-03-01), Howie et al.
patent: 5210041 (1993-05-01), Kobayashi et al.
patent: 5219765 (1993-06-01), Yoshida et al.
patent: 5240866 (1993-08-01), Friedman et al.
patent: 5321620 (1994-06-01), Tanaka et al.
patent: 5343388 (1994-08-01), Wedelin
patent: 5442731 (1995-08-01), Tanaka et al.

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