Out of control signals are produced from control charts when __________.
A)a single point is outside the control limits
B)consecutive points are outside the control limits
C)Both A and B are possible.
D)None of the above

Question

Quizplus · Accepted Answer

Control charts are designed to monitor a process over time and identify when the process is producing output outside of the expected variation. A single point outside the control limits can be a random fluke and may not indicate a problem with the process. However, when consecutive points are outside the control limits, it indicates that the process is producing output consistently outside the expected variation, which may indicate a problem. Therefore, both A and B are possible causes for out of control signals on a control chart.

Out of Control Signals Are Produced from Control Charts When