If a process is in control, less than 0.3% of all the points that represent the process output such as the average measurement or the proportion defective should be beyond the upper and lower control limits.

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Quizplus · Accepted Answer

This statement is true for a process that is in control. It means that the process is stable and there are no special causes of variation present. If less than 0.3% of the points fall outside the control limits, it indicates that the process is capable of producing consistent results within the expected range of variation.

If a Process Is in Control, Less Than 0