An Application of The Integration Model of MRP and TOC in Flow Shop Production

• Main Authors: Lin, Hsien-Tsung, 林憲宗
• Other Authors: Hsu Tsung-Shin
• Format: Others
• Language: zh-TW
• Published: 1997
• Online Access: http://ndltd.ncl.edu.tw/handle/91114818585781036132

碩士 === 國立台灣工業技術學院 === 管理技術研究所 === 85 === MRP系統因其後推排程的方式無法對瓶頸資源做一有效的控制，造成 排程的效率不彰，製造現場堆積大量的在製品卻無法準時交貨等問題。基 於為了達到不缺貨及減少現場在製品理由，本研究將把限制理論（theory of constraint：TOC）的觀念運用於MRP中，以改善MRP系統中不合理的缺 失。 本研究將以一個製造機電類壓縮機的公司為例，以模擬的方式針 對MRP、TOC與兩者之整合模式Buffer-modified MRP做系統績效的比較。 研究放置一個緩衝區（buffer）於一個以MRP排程方法為主之流程型（ flow shop）生產系統的瓶頸作業前，評估其對於整體系統的影響。 本研究結合MRP系統的排程機構與TOC系統的緩衝區機構，而形成了 Buffer-modified MRP模式，並針對此三個模式執行模擬研究，經模擬結 果績效分析顯示在不對現況作重大改變時，整合模式的績效確實比MRP模 式來得好，而且平均在製品的數量是三個模式中最低的。關鍵字：限制理 論、模擬、流程型 MRP scheduling method cannot control the contraining operation very well and make a large work-in-process（WIP）then cannot deliver on time. So the study will use TOC concept in MRP production system to improve the problems of MRP. A buffer- modified MRP was utilized. This environment used MRP scheduling with a buffer inserted prior to the contraining operation in a flow shop. The study presents the findings from a simulation using actual production data comparing the MRP scheduling method with that of drum-buffer-rope（DBR）from the TOC with buffer- modified MRP. The simulation is based on production information from a compressor factory currently using MRP. An analysis of results of all scenarios indicates that the constraints buffer used in DBR was successful in increasing output from the system. Keywords：TOC; DBR; Flow shop; Simulation