A process is said to be out of control if
A)a point falls above the upper or below the lower control lines.
B)eight or more consecutive points fall above the center line or eight or more consecutive points fall below the center line.
C)Either of the above.
D)None of the above.

Question

Quizplus · Accepted Answer

Both A and B indicate that the process is out of control. A signifies that a single data point is beyond the control lines, indicating a significant deviation from the mean. B indicates that multiple consecutive data points in the same direction also indicate a lack of control. Therefore, both A and B are correct, and the best choice is C. Option D is incorrect in this case.

A Process Is Said to Be Out of Control If