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Publication date: 07/30/2020

Specified Statistics

After specifying a process variable, if you click the Specify Stats button on the launch window, a tab with editable fields is appended to the bottom of the window. This lets you enter statistics obtained for the process variable from historical data. The UWMA and EWMA platforms use those entries to construct control charts.

Note: When the mean is user-specified, the center line in the plot is labeled μ0.

If you check the Capability option on the launch window, a window appears after you click OK that asks for specification limits. After you enter the specification limits and click OK, capability output appears in the same window next to the control chart. For information about how the capability indices are computed, see Capability Indices for Normal Distributions in the Process Capability section.

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