A process is considered to be under control when all of the following are true except ________.
A)only special causes of variation are present
B)variation in the distribution of output is due to common causes
C)only common causes of variation are present
D)the process output is stable and predictable

Question

Quizplus · Accepted Answer

When a process is under control, only common causes of variation are present, and the process output is stable and predictable. Special causes of variation are unexpected events or factors that can cause variation in the output, and their presence indicates that the process is not under control. Therefore, option A) is incorrect. Option B) correctly states that variation in the distribution of output is due to common causes when a process is under control. Option C) is also correct as only common causes of variation are present when a process is under control. Option D) is correct as the process output must be stable and predictable when a process is considered to be under control.

A Process Is Considered to Be Under Control When All