CPL 1 implies that the process mean is more than three standard deviations away from the lower specification limit.

Question

CPL >1 implies that the process mean is more than three standard deviations away from the lower specification limit.

Quizplus · Accepted Answer

CPL (capability index for the upper specification) is calculated by subtracting the process mean from the upper specification limit and dividing by three times the process standard deviation. Therefore, CPL > 1 means the process mean is more than three standard deviations away from the lower specification limit.

CPL >1 Implies That the Process Mean Is More Than