Taiwan Semiconductor Manufacturing Comp. Ltd.

Hsing-Chung Lin

Chiang-Chou Lo

Fang-Jen Hsu

Chao-Yu Hsieh

Calculate the WIP for a stage ST for each lot Li in a queue of lots being processed in a production line between the stage ST and an end point, where &ldquo;i&rdquo; is a positive integer representing the position of the lot Li in the queue, and where &ldquo;kk&rdquo; is a positive integer indicating the sequential position of the stage ST (location along the production line) from the beginning to the end of a predetermined portion of the production line. Calculate remaining scheduled cycle time (RCT ) for each lot Li. Calculate consumed scheduled cycle time (CST ) for each lot Li. Calculate (WIP *RCT ) for each lot Li. Calculate (WIP*CST ) for each lot Li. Sum WIP *RCT for all lots Li of a stage. Sum WIP *CST for all lots Li of a stage. Calculate the Index of Dynamic Forward Loading Intensity (I ) for each stage ST by dividing the (Sum WIP *RCT , for all lots of the stage) by the (Sum WIP *CST , for all lots of the stage) where kk is a positive integer indicating the location of the stage from the beginning to the end of the production line. Adjust the dispatching order of lots based on the rankings of the stages of the production I line, with lowest I ratings having priority.

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Tao-Yuan, Taiwan

Hsing-Chung Lin