Individuals Chart
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Stat > Control Charts > Variables Charts for Individuals > Individuals

An individuals chart is a control chart of individual observations. You can use individuals charts to track the process level and detect the presence of special causes when the sample size is 1.

By default, individuals chart estimates the process variation, s, with MR / d2, the average of the moving range divided by an unbiasing constant. Moving ranges are artificial subgroups created from the individual measurements. By default, the moving range is of length 2, since consecutive values have the greatest chance of being alike. You can also estimate s using the median of the moving range, change the length of the moving range, or enter historical values of s.

For more information, see Control Charts Overview and Variables Control Charts for Individuals Overview.

Dialog box items

Variables: Enter one or more columns containing the outcome measures.

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