What specific condition does `test1` check for?

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Réponse

`test1` checks for one point that falls beyond Zone A, which means it is outside the upper or lower control limits.
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What pattern is identified by `test2`? 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? What does the `allN` parameter do in the cChart action? How does the `sigmas` parameter affect the control limits?
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