If a sample of items is taken and the mean of the sample is outside the control limits the process is

A) out of control and the cause should be established.
B) in control, but not capable of producing within the established control limits.
C) within the established control limits with only natural causes of variation.
D) monitored closely to see if the next sample mean will also fall outside the control limits.
E) producing high quality products.

Question

Rolla Hindawi · Accepted Answer

Final Answer : A, Explanation :  If the mean of the sample is outside the control limits, it indicates that there is a special cause of variation present in the process. Therefore, the process is out of control, and the cause of the issue should be identified and corrected to prevent further non-conforming products from being produced.

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