Effects of autocorrelation on control chart performance |
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| Authors: | Layth C. Alwan |
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| Affiliation: | School of Business Administration , University of Wisconsin-Milwaukee , P.O. Box 742, Milwaukee, WI, 53201 |
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| Abstract: | In this article, we study the capability of the standard control chart for individual observations with fixed control limits to identify special causes reflected as isolated extreme points in the presence of autocorrelation. We consider both the application of standard Shewhart limits and moving-range limits and derive the risks of false positive and false negative when the control chart observations follow a general ARMA(p,q) process. |
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| Keywords: | Statistical process control Shewhart chart moving-range special cause |
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