The output of a process may not conform to specifications even though the process may be statistically "in control."

Question

Quizplus · Accepted Answer

A process being statistically "in control" means that the variation observed in the output is due to random (common) causes and not due to special (assignable) causes. However, the process can still produce outputs that do not meet the specified quality requirements if the process's natural variability is too wide or if the process mean is off-target.

The Output of a Process May Not Conform to Specifications