iSixSigma

Control Limits

Definition of Control Limits:

Control limits define the area three standard deviations on either side of the centerline, or mean, of data plotted on a control chart.

Do not confuse control limits with specification limits. Control limits reflect the expected variation in the data.

Bilateral specification/tolerances have two limits on both side of the tolerances, which is not appreciated in unilatral tolerances.

« Back to Dictionary Index