Which of the following would produce an out-of-control signal in a control chart?
A)One point below the upper control limit or one point above the lower control limit
B)A run of nine points over the center line or a run of nine points below the center line
C)All of the above
D)None of the above

Question

Quizplus · Accepted Answer

A run of nine points on one side of the center line indicates a non-random pattern, suggesting a process shift, which would produce an out-of-control signal in a control chart.

Which of the Following Would Produce an Out-Of-Control Signal in a Control