| Summary: | 碩士 === 國立雲林科技大學 === 工業工程與管理研究所碩士班 === 93 === Hotelling developed T2 control chart for monitoring multivariate process in 1947. Due to more complicated of industrial process nowadays, Hotelling’s T2 control chart is widely used on controlling several related characteristics because of its simplicity. However, T2 control chart cannot signal immediately when small or moderate process shift occurs. For increasing sensitivity of T2 control chart, firstly Markov chain is used to obtain runs rules appropriate for T2 control chart under ARL0 is 200, 500, 370 and 1000. Secondly, test the contribution of each rules by appearance frequency and combined rules which with high frequency. Furthermore, loosen the control limit to control the serious type I error of rules. For verifying the contribution and practicability, comparison based on ARL performance between the basic T2 control chart, T2 control chart which incorporates runs rules and MEWMA is practiced in this research. The research result indicates that T2 control chart combined runs rules can perform as better as MEWMA when small process shift occur, and even better when moderate or large process shift occur.
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