How does the action handle subgroups with varying sample sizes?

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Réponse

By default, tests for special causes are not performed when subgroup sample sizes vary. To enable these tests in such cases, you must set the 'testNStd' parameter to True.
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cChart

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Other questions about cChart
How does the `sigmas` parameter affect the control limits? What pattern is identified by `test2`? What does the `allN` parameter do in the cChart action? Can I run tests for special causes if my control limits are not 3-sigma? What is the mandatory parameter for using the cChart action?
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