If six points in a row are all headed either upward or downward,or if nine points in a row are on the same side of the centerline,the process is judged to be out of control.

Question

Quizplus · Accepted Answer

This statement is true according to the rules of statistical process control. These patterns indicate an unusual or abnormal variation in the data, which may require investigation and corrective actions.

If Six Points in a Row Are All Headed Either