Control Chart Tests Based on Geometric Moving Averages


Roberts. S. W.   (2000, ASQ and American Statistical Association)   Bell Telephone Laboratories

Technometrics    Vol. 42    No. 1
QICID: 13871    February 2000    pp. 97-101
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Article Abstract

[This abstract is based on the author's abstract.] A geometric moving average gives the most recent observation the greatest weight. The weights of all previous observations decrease 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. The properties of control chart tests based on geometric moving averages are compared to tests based on ordinary moving averages.


Control charts,Geometric Moving Average (GMA) charts,Statistical weights,Testing,Moving average chart

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