1994•Communications in Statistics - Simulation and ComputationRequires access

A study of parabolic control limits for the ewma control chart

Robert E. Davis, William H. Woodall

Abstract

Holmes and Mergen(1992)proposed the use of parabolic control limits for exponentially weighted moving average(EWMA)controlcharts.It is shown in an example that the usual control limits for the EWMA control chart perform much better than theparabolic control limits and are computationally more efficient

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Key concepts: EWMA chart, Control chart, Control limits, Limit (mathematics), Mathematics, Control (management), Control theory (sociology), Chart