Control system and methods for managing a production operating under time constaraints
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United States of America Patent
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May 30, 2006
Grant Date -
Mar 10, 2005
app pub date -
Sep 9, 2003
filing date -
Sep 9, 2003
priority date (Note) -
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Abstract
A control system for a production process having a plurality of operations. A plurality of time constraints exist between the operations. The control system includes a control module that defines a plurality of sub-time constraints between each two operations, generates a plurality of equations according to the time constraints and the sub-time constraints, and calculates the sub-time constraints using the equations. The control module then determines whether a status for each operation defined according to a Work-In-Process (WIP) quantity between a first operation and a checked operation and a throughput rate thereof violates sub-time constraints between the first operation and the checked operation, and releases a lot into the production line if the status for each operation satisfies the corresponding sum of the sub-time constraints.
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