Adaptive R charts with variable parameters

作者：Lee Pei Hsi^*

来源：Computational Statistics & Data Analysis, 2011, 55(5): 2003-2010.

DOI：10.1016/j.csda.2010.11.026

• Shewhart R control chart
• Adaptive control charts
• Statistical design
• Markov chain method
• Distribution of relative range

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.

• 出版日期2011-5-1