以達交率為導向之模擬研究──以LED晶片製造廠為例

A Simulation Study of Raising Hit Rate for LED Chip Foundry

達交率與生產週期時間是半導體製造業工單排程的主要指標，本研究探討不同的派工法則應用於LED晶片製造製程，使用ProModel 6.0模擬軟體建構模擬模型來進行模擬實驗，以工單達交率與生產週期時間為績效指標，所評估的派工法則包括先進先出法（First In First Out, FIFO）、最早交期法（Earliest Due Date, EDD）、最短加工時間法（Shortest Processing Time, SPT）以及關鍵比值法（Critical Ratio, CR）。模擬實驗結果顯示，EDD法則的達交率最高，而SPT法則的生產週期時間最短。

The hit rate and production cycle time are primary performance measures in the LED chip foundry. This research studies different dispatching rules for the manufacturing process of LED chip foundry. Simulation models are conducted to evaluate the performances of four different dispatching rules, First In First out (FIFO), earliest due date (EDD), shortest processing time (SPT) and critical ratio (CR). Simulation results show that EDD rule has the best performance of hit rate, and SPT rule has the best performance of production cycle time.