Circle Chart for the Monitoring of Maxima in Periodic Processes |
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| Authors: | Peipei Deng Thong Ngee Goh Yuan Cheng Min Xie |
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| Affiliation: | 1. Department of Industrial & Systems Engineering, National University of Singapore, Singapore, Singapore;2. Department of Systems Engineering and Engineering Management, City University of Hong Kong, Hong Kong, P. R. China |
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| Abstract: | An important process characteristic is process maxima as it is often an important quality or performance parameter. Such measurements often play a vital role in process analysis and have to be monitored carefully. In this paper, we consider the problem of monitoring process maxima when the process exhibits a kind of periodicity. A circle chart for periodical process maxima with or without seasonal patterns monitoring is developed and studied, by modeling the process maxima using the extreme value distribution. Mean normalization is applied for periodic process monitoring with seasonal patterns to facilitate comparison between different sections and periods. The average cycle run length is proposed to measure charting efficiency. Copyright © 2014 John Wiley & Sons, Ltd. |
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| Keywords: | circle chart periodic process maxima extreme value distribution mean normalization average cycle run length |
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