It is not possible for the chart to be out of control when the R chart is in control.

Name: It is not possible for the chart to be out of control when the R chart is in control.
Brand: Quizplus
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Question

Quizplus · Accepted Answer

The control of the R chart does not guarantee the control of the process. The R chart only provides information on the variability of the individual samples, not the mean or location of the process. Therefore, the chart can still be out of control even if the R chart is in control.

It Is Not Possible for the Chart to Be Out