The width between the upper and lower limits of a control chart should be wider than the width between the upper and lower tolerance limits.

Question

Quizplus · Accepted Answer

The width between the upper and lower limits of a control chart is typically narrower than the width between the upper and lower tolerance limits because control limits are based on process variability and are designed to detect process variation, while tolerance limits are set based on design requirements or customer expectations.

The Width Between the Upper and Lower Limits of a Control