多功能機台最適調整方案之研究—

Abstract

現今多數的機台都具備有多功能的性質，藉由參數的調整之後，就可以轉換成為另一種作業內容，以支援短期產能不足的機台群。在不考慮派工與投料的前提下，本研究發展一套「多功能機台最適調整方案」的系統，藉以「提升非瓶頸機台群的利用率」，避免因機台閒置而造成無謂的浪費，且同時有效增加瓶頸機台的產出與降低瓶頸機台負荷過重以及在製品存貨過多的情形。 本系統是以趨勢分析法的觀念來取代平均法，可有效的縮小可行解的範圍，另加上產能狀況、支援能力、及調整機台前所需的設置時間等指標之綜合運算來找尋最佳的替代機台，以有效紓解短期內瓶頸機台產能不足之處。最後以一個案例來說明並驗證之。

Most of the machines are multifunctional in IC foundries. A multifunctional machine can be reset to maximize the moves of the bottleneck machine group. Such machine reset up problem is called as multifunctional machines adjustment problem. In this research, we develop an approach to solve the problem mentioned above. The purpose of this research is to maximize the moves of the bottleneck machine group under the constraints of non-decreasing the local moves of some other machine groups with high degree of utilization. We modify the approach proposed by Pu. The steps of the approach proposed in this research are stated as follows: (1) we identify the bottleneck machine group; (2) we search the alternative machine groups which can be reset up and become a member in the bottleneck machine group; (3) we develop a multi-criteria decision making model to determine the priorities of these alternative machine groups to become a member in the bottleneck machine groups; and (4) we add one of the machine in the alternative machine group with the highest priority to the bottleneck machine group. Then the new machine mix configuration is proposed. Further, we use a near real IC foundry example to illustrate and to verify the performance of the proposed approach. The simulation results show that the aim of this research can be easily obtained by the proposed approach.