When only natural variations are present,an SPC chart will seldom show a point outside of control limits.

Question

Quizplus · Accepted Answer

This is a true statement. SPC charts are designed to identify when a process is experiencing special causes of variation, which can indicate problems or opportunities for improvement. When only natural variation is present, the process should be stable and the SPC chart should show data points clustered near the center of the control limits, with few if any points outside those limits.

When Only Natural Variations Are Present,an SPC Chart Will Seldom