An SQC chart has a center line that represents an average and upper and lower control limits that fix the limits of normal variation caused by the common causes.

Question

Quizplus · Accepted Answer

This is a correct statement about SQC (Statistical Quality Control) charts. They are used to monitor a process and detect any unusual variation that may be caused by common or special causes. The center line represents the mean or average of the data, while the upper and lower control limits indicate the range within which the process is expected to operate due to common causes. Any data points that fall outside these limits may signal the presence of special causes, which require investigation and corrective action.

An SQC Chart Has a Center Line That Represents an Average