How do we know when a process is in control?
A) Thecontrol chart shows sample means that are randomly distributed between the control limits.
B) Each observation sampled is drawn from an identical distribution.
C) Thecontrol chart shows no patterns or cycles in the plotted sample means.
D) All of these choices are true.

Question

Quizplus · Accepted Answer

All of these choices are true indicators that a process is in control. Randomly distributed sample means between control limits, drawn from an identical distribution, and no patterns or cycles in the plotted sample means are all characteristics of a stable and predictable process.

How Do We Know When a Process Is in Control