Which of the following situations suggests a process that appears to be operating in a state of statistical control?
A) a control chart in which no points fall outside either the upper control limit or the lower control limit and no patterns are present
B) a control chart in which several points fall outside the upper control limit
C) a control chart with a series of consecutive points that are above the center line and a series of consecutive points that are below the center line
D) all of the above

Question

Quizplus · Accepted Answer

A control chart in which no points fall outside either the upper control limit or the lower control limit and no patterns are present suggests that the process is operating in a state of statistical control. This means that the process is stable and within acceptable limits of variation. Any points outside the control limits or patterns suggest that there are issues with the process and that it may be out of control. Therefore, options B and C are incorrect.

Which of the Following Situations Suggests a Process That Appears