The principal focus of the control chart is the attempt to separate special or assignable causes of variation from common causes of variation. Which causes of variation can be reduced only by changing the system?
A) special or assignable causes
B) common causes
C) total causes
D) none of the above

Question

Quizplus · Accepted Answer

Common causes of variation are inherent to the system and can be reduced or eliminated only by changing the system. Special or assignable causes of variation are due to specific events or circumstances and can be addressed individually without changing the system. Total causes include both common and special causes.

The Principal Focus of the Control Chart Is the Attempt