Monitoring Process Mean and Variability with One EWMA Chart
- 1 April 2001
- journal article
- research article
- Published by Taylor & Francis in Journal of Quality Technology
- Vol. 33 (2) , 223-233
- https://doi.org/10.1080/00224065.2001.11980069
Abstract
Two EWMA charts are usually required to monitor both process mean and variability. In this paper, we propose a new EWMA chart which effectively combines the usual two EWMA charts into one chart. In particular, the new EWMA chart has the property that it is effective in detecting both increases and decreases in mean and/or variability.Keywords
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