| Summary: | 碩士 === 國立勤益科技大學 === 工業工程與管理系 === 97 === In order to reach a larger capacity and better quality, TFT-LCD industry needs to control the Bullwhip Effect through its supply-chain management and consequently to increase the efficiency of the overall supply-chain. How to decrease the surplus stock cost caused by supplying more than what is demanded and how to decrease the opportunity cost happened while demand is much larger than the supply have become the major issues the industry need to solve. The research here is based on the theories related to supply chain management and Bullwhip Effect created domestically or internationally and then to further study and analyze the current status and problem faced by our TFT-LCD industry, to analyze the strategies applied and concerns that the industry have, and then through the 6-Sigma’s DMAIC to solve the Bullwhip Effect on TFT-LCD industry. By evaluating the problems faced by the company, we used Supply & Demand Performance Evaluation Matrix and Bullwhip Effect control chart to evaluate and analyze the Bullwhip Effect of the supply chain, and also through ARIMA, we’ve come up with a customized supply & demand estimation mode of the supply chain. In the end, the changes in each anticipated benefit indicator before and after the improvement were all put under evaluation, and by applying the concept obtained from Taguchi Loss Function, we could actually quantify the contribution level of this research.
The result of the research showed that there was obvious improvement found in each anticipated benefit indicator. Also, the Loss Function was improved from the original mode, 3,046,104 down to 394,566 NTD, successfully decreasing cost loss of the supply chain to around 87%. Which means the supply chain Bullwhip Effect evaluation and improvement modes created by this research could effectively solve the problems found in the company’s supply chain Bullwhip Effect. As a result, the upstream panel components suppliers could accurately foresee the demand volume from its downstream name brand customers and end users and then prepare accordingly, which could greatly increase the company’s supply chain effect and its general competitiveness.
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