When a process is influenced only by common causes of variation:
A)The process may also be influenced by assignable causes of variation.
B)Many plot points on a control chart will be outside the control limits.
C)The process is always capable of meeting customer requirements.
D)The process is in statistical control.
E)The process is never capable of meeting customer requirements.

Question

Quizplus · Accepted Answer

When a process is influenced only by common causes of variation, it means the process is in statistical control. This is because common causes of variation are inherent in the process and cannot be eliminated completely. A control chart helps us to identify whether the process is in statistical control, and if all the data points fall within the control limits, it indicates that the process is stable and predictable. Common causes of variation do not cause the process to be out of control or incapable of meeting customer requirements.

When a Process Is Influenced Only by Common Causes of Variation