If all of the control points on a control chart lie between the UCL and the LCL, the process is always in control.

Question

Quizplus · Accepted Answer

While having all control points between the UCL (Upper Control Limit) and LCL (Lower Control Limit) suggests a process might be in control, it doesn't guarantee it. Other patterns, such as systematic variation or trends, could indicate the process is out of control despite all points being within these limits.

If All of the Control Points on a Control Chart