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This module is used for quick diagnostics of univariate processes simultaneously by 3 different control charts. It enables the user to assess stability, process changes and outliers and to select a suitable chart type for possible further analysis of similar processes. The module offers Shewhart x-individual chart (without special causes diagnostics), autoregression (AR) control chart and dynamic one-step-ahead prediction EWMA control chart. This module is a simplified alternative to standard control.

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The following table is an informative guide for selecting an appropriate chart based on an autocorrelation function (ACF) available from the Basic Statistics module. In each column of the illustration there is a specific pattern of data possibly suitable for Shewhart, Autoregression, or EWMA control charts.

Multiple control charts

Last Updated ( 25.03.2013 )
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