Performance of the zone control chart |
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| Authors: | Robert B. Davis Anthony Homer William H. Woodall |
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| Affiliation: | 1. Statistics Department , Univ. of Southwestern , USL Box 41006, Lafayette, LA, 70504;2. The Boots Company Inc , 8800 Ellerbe Road P. O. Box 6750, Shreveport, LA, 71136;3. Department of Management Science and Statistics , University of Alabama , Tuscaloosa, AL, 35487-0226 |
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| Abstract: | Average run lengths of the zone control chart are presented, The performance of this chart is compared with that of several Shewhart charts with and without runs rules, It is shown that the standard zone control chart has performance similar to some even simpler charts and a much higher false alarm rate than the Shewhart chart with all of the common runs rules. It is also shown that a slightly modified zone control chart outperforms the Shewhart chart with the common runs rules. |
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| Keywords: | average run length Shewhart chart statistical process control |
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