Abstract
A modified Shewhart-exponentially weighted moving average X-bar statistical control scheme is evaluated. It is characterized by the use of a Shewhart component requiring two (or more) plotted points beyond reduced width (i.e., less than three-sigma) control limits to give an out-of-control signal. Schemes with both better average run length profiles and better early false-signal characteristics than those associated with standard Shewhart-runs rules schemes are suggested.
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KLEIN , M. Modified Shewhart-exponentially weighted moving average control charts. IIE Transactions 29, 1051–1056 (1997). https://doi.org/10.1023/A:1018564706141
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DOI: https://doi.org/10.1023/A:1018564706141