Process capability calculations make little sense if the process:
A)data were taken over a period of time.
B)is not in statistical control.
C)variations are due to special causes.
D)has control but is not capable.

Question

Quizplus · Accepted Answer

Process capability calculations are only meaningful when the process is in a state of statistical control. If the process is not in control, there may be non-random sources of variation that can make the process appear more or less capable than it actually is. Therefore, before calculating process capability indices, it is important to first ensure that the process is stable and in control.

Process Capability Calculations Make Little Sense If the Process