Manufacturing process change control apparatus and manufacturing process change control method
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United States of America Patent
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-
Sep 25, 2001
Grant Date -
N/A
app pub date -
Aug 28, 1998
filing date -
Aug 29, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A process change control apparatus that performs a control function based on information from a manufacturing process is provided in a manufacturing process control system. The change control apparatus includes a recorder which records a change item for which a manufacturing process change control is to be performed, information required for a making judgment, a judgment method, an for extracting date from a manufacturing process and recording required information before and after a change point for each change item recorded in the, a statistical comparison judging device which performs a statistical comparison judgment of the information extracted by the information extractor before and after the change point for each change item, and an output device which outputs the result of the comparison judging device.
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