多種生產週期時間產品最適允諾交期及價格之探討

Abstract

晶圓代工廠為了滿足顧客對產品交期急迫性的不同需求，提供多種生產週期時間產品服務。然而產出及生產週期時間並非線性關係，若允諾顧客生產週期時間訂定失當，將造成客戶及晶圓代工廠承受額外的損失，因此該如何針對多種生產週期時間服務訂定適當的允諾顧客生產週期時間，是廠商必須思考的課題。本研究在產品組合給定的情況下，發展系統化的方法，考慮短生產週期時間產品比例對生產績效造成的影響，提出允諾顧客生產週期時間以及最適短生產週期時間產品比例之建議；並以利潤固定為前提，訂定多種生產週期時間產品之價格，供管理者作參考。

In order to meet the customer requirements for more shorter committed cycle time, IC foundries provide multiple cycle time product service. It means that wafer lots are assigned different committed manufacturing cycle time based on customer’s demands. However, there is not linear relationship between throughput and manufacturing cycle time. If the companies determine the wrong committed cycle time decision, it would bring some loss to companies and customers. So, how to determine a appropriate committed cycle time is the most important thing for IC foundries. Based on this idea, this research proposes a systematic approach to determine various committed cycle time and the corresponding relative prices. We use ASAP, the semiconductor manufacturing line simulator, to analyze the impact of different percentage of shorter cycle time lots on the decrease of lots that are made within the committed cycle time. Then we propose new committed manufacturing cycle time for different percentage of shorter cycle time lots. Finally, we calculate the prices of shorter cycle time products for particular committed cycle time based on fixed net profit assumption.