Indications in a control chart of an out-of-control situation include all of the following EXCEPT:
A) a shift in the average value.
B) the same number of points above and below the center line.
C) points that lie outside upper and lower control limits.
D) a cyclical pattern in the chart.

Question

Quizplus · Accepted Answer

A control chart is a tool used in quality control to monitor a process and detect any deviations from the expected performance. An out-of-control situation is indicated by points that lie outside the upper and lower control limits or a cyclical pattern in the chart, indicating a variation that is not random. A shift in the average value is also an indication of an out-of-control situation. However, having the same number of points above and below the centerline is not a reliable indicator of an out-of-control situation.

Indications in a Control Chart of an Out-Of-Control Situation Include