Question

Examine the given run chart or control chart and determine whether the process is within statistical control. If it is not, identify which of the three out-of-statistical-control criteria apply.

A. Process mean is not within statistical control. One of the points lies above the upper control limit.


B. Process mean is not within statistical control. There are points above and below the control limits.


C. Process mean is not within statistical control. There is an upward trend which is indicating an increase in variation.


D. Process mean is within statistical control.

Answer 1

(B) Process mean is not within statistical control. There are points above and below the control limits. There is a shift upward.

Explanation:

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