Abstract
Exponentially weighted moving averages (EWMA) or Cumulative sum (CUSUM) monitoring plans are used in industry for early detection of deviations from target for process measurements. This paper illustrates the advantage of using weighted moving averages (WMA) in this regard, particular when the size of the shift is known in advance. WMA plans are compared to the conventional CUSUM and the EWMA procedures using a simulation study.
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