One purpose of control charts is to bring attention to the possible existence of _____ cause variation.
A) common
B) assignable .
C) both common and assignable
D) neither common or assignable

Question

Quizplus · Accepted Answer

Control charts are used to differentiate between common cause and assignable cause variation. Common cause variation is the natural variability present in any process, while assignable cause variation is caused by a specific factor that can be identified and eliminated. By plotting data on a control chart, any points outside the control limits or any patterns that may be present can be signals of assignable cause variation and can be investigated further. Therefore, the purpose of control charts is to bring attention to the possible existence of assignable cause variation.

One Purpose of Control Charts Is to Bring Attention to the Possible