A Study on the Manufacturing Strategy for Mid- and Up-Stream Factories in a Supply Chain System

• Main Authors: Li-Hsu Pan, 潘李旭
• Other Authors: Ming-Chih Chen
• Format: Others
• Language: zh-TW
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/02753798220332468904

碩士 === 朝陽科技大學 === 工業工程與管理系碩士班 === 97 === Due to economic depression and competitive environment, enterprises need more advanced manufacturing strategies to improve their competitiveness. The objective of an enterprise is shifted from local optimization of single factory to global optimization of the entire supply chain system. A lot of research focused on the effectiveness of dispatching rules for job shops and flow shops, however, only a few consider the effects of different production control systems, not to mention taking into account more than one factory in a supply chain system. Therefore, the purpose of this study is to evaluate the combinations of dispatching rules and production control systems for factories in a supply chain system. This study utilizes systems simulation to model a simple supply chain manufacturing system with up-stream job shops and mid-stream flow shops. Simulation results are collected according to four performance criteria, i.e., mean flowtime, percentage of tardiness, work-in-process(WIP), and throughput. In addition to the best combination of dispatching rules and production control system for single factory, this research compares the manufacturing strategy of single factory with that of the entire supply chain system. The results show that the single factory and the supply chain system need different manufacturing strategies to get better performance. The CONWIP system is better than push system on mean flowtime and WIP criteria for single factory, however, the push system has better performance overall for mid-stream flow shop of the supply chain system. Finally, this study also performs a sensitivity analysis on the number of Kanban for the CONWIP system. The results show different optimal numbers of Kanban under various performance criteria. Keyword: Supply Chain System, Systems Simulation, Production Control System, Dispatching Rule