Adaptive R charts with variable parameters

Pei-Hsi Lee

Computational Statistics & Data Analysis, 2011, vol. 55, issue 5, 2003-2010

Abstract: The Shewhart R control chart (R chart) has been widely used to monitor process variance. However, the main disadvantage of an R chart is its slowness to signal small increases on the variability. In this paper, ideas of adaptive control charts are extended to the Shewhart R chart for improving efficiency in signaling increases on the variance. A Markov chain model is applied to evaluate its performance. The statistical performance shows that the R chart with variable parameters (VP) is more sensitive to variance increases.

Keywords: Shewhart; R; control; chart; Adaptive; control; charts; Statistical; design; Markov; chain; method; Distribution; of; relative; range (search for similar items in EconPapers)
Date: 2011
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Citations: View citations in EconPapers (3)

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