If a sample of parts is measured and the mean of the measurements is outside the control limits, the process is
A) in control, but not capable of producing within the established control limits.
B) out of control and the process should be investigated for assignable variation.
C) within the established control limits with only natural causes of variation.
D) monitored closely to see if the next sample mean will also fall outside the control limits.
E) within the acceptable range.

Question

Quizplus · Accepted Answer

When the mean of a sample of parts is outside the control limits, the process is considered out of control and should be investigated for assignable variation. This means that there may be a specific cause for the variation that needs to be addressed in order to bring the process back into control.

If a Sample of Parts Is Measured and the Mean