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Synthetic double sampling s chart |
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| Authors: | Ming Ha Lee Michael B C Khoo |
| Institution: | 1. Faculty of Engineering, Computing and Science, Swinburne University of Technology Sarawak Campus, Kuching, Sarawak, Malaysia;2. School of Mathematical Sciences, Universiti Sains Malaysia, Penang, Malaysia |
| Abstract: | This study proposes a synthetic double sampling s chart that integrates the double sampling (DS) s chart and the conforming run length chart. An optimization procedure is proposed to compute the optimal parameters of the synthetic DS s chart. The performance of the synthetic DS s chart is compared with other existing control charts for monitoring process standard deviation. The results show that the synthetic DS s chart is more effective for detecting increases in the process standard deviation for a wide range of shifts. An example is provided to illustrate the operation procedure of the synthetic DS s chart. |
| Keywords: | Control chart double sampling chart s chart synthetic chart |