Control Chart Tests Based on Geometric Moving Averages
- 1 August 1959
- journal article
- research article
- Published by JSTOR in Technometrics
- Vol. 1 (3) , 239
- https://doi.org/10.2307/1266443
Abstract
A geometrical moving average gives the most recent observation the greatest weight, and all previous observations weights decreasing in geometric progression from the most recent back to the first. A graphical procedure for generating geometric moving averages is described in which the most recent observation is assigned a weight r. The properties of control chart tests based on geometric moving averages are compared to tests based on ordinary moving averages.Keywords
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