考慮晶圓製造廠整廠績效之組合式即時派工法則

Abstract

晶圓製造是目前發展最快速的製造工業之一．由於晶圓製造廠的生產 特性異於傳統流程型或零工式的生產方式，包括產品多樣少量、工件回流 現象、批量分割及成批作業等，使得晶圓製造廠的生產排程變得非常複雜 ，派工法則的建立則成為實務上解決晶圓製造廠現場監控問題最普遍的方 法．然而，目前相關的研究上，多為針對機台特性所發展的派工法則，可 充份應用於實務或可兼顧整廠績效的模式尚付之闕如，以至於目前晶圓製 造廠所使用的派工法則多為一般常用的優序選擇或根據線上作業員的經驗 判斷，無法顧及整廠的實質效益，因此，實務上急需一個容易執行並顧及 整廠績效的派工法則． 本研究應用限制理論的觀念，將整個工廠依特 性分成瓶頸機台、非瓶頸機台與成批加工 機台，分別予以不同的管理方 式，同時發展一個可達到最大產出，並能輔以滿足顧客交期及節省機台設 置時間的派工法則，並建立一套訂定及修正工件優序值的自動化工具，給 予線上作業員選貨時的一個明確的參考指標． Semiconductor Manufacturing is one of the most quickly growing manufacturing industries. This is because the production characteristics of thesemiconductor manufacturing factory are quite different from the traditionalflow shop or job shop. These characteristics include products of many kinds and of small quantities with reentry, batch processing and so on, and this makes the production schedule complicated. The dispatching rules are the most common method of solving the job shop control problems in the semiconductor manufacturing factory. However, studies in this field show that most of the dispatching rules are made in accordance with the specificfunction of particular machines, so there is little generalized application to partical manufacturing, and there is no consideration made of the performanceof the whole factory. Therefore, it is importance to make practical dispatchingrules in consideration of performance in the factory as a whole. The TOC theory is implemented in this study. We must distinguish thebottleneck machines from non- bottleneck machines according to their respectiveutilization. They are managed in different ways. The result of the dispatchingrule is expected to maximize throughput, to meet due dates and to reduce theset up time. These new dispatching rules will give a clear index to operatorsin the manufacturing lines to avoid mistakes caused by human beings.