If the values in a control chart follow a pattern (instead of being random),then ______.
A)we can say that a special cause is present
B)the process is within control
C)the operator is out of control
D)there is excessive common cause variation

Question

Quizplus · Accepted Answer

If the values in a control chart follow a pattern, it indicates the presence of a special cause, indicating that the process is not in control. Common cause variation is random and follows a natural pattern within specified limits. However, a non-random pattern indicates that a special cause has affected the process, which needs to be identified and eliminated to bring the process back within control. The operator's behavior may also contribute to special causes, but it is not the only factor.

If the Values in a Control Chart Follow a Pattern