Which of the following is not one of the criteria for determining if a control chart indicates that a process is not statistically stable?
A) Decreasing variation
B) Downward trend
C) Upward shift
D) Exceptional value

Question

Quizplus · Accepted Answer

Decreasing variation is actually a desired result in a control chart, as it indicates that the process is improving and becoming more stable. The other three options (downward trend, upward shift, exceptional value) all indicate that the process is not statistically stable.

Which of the Following Is Not One of the Criteria