You have created a control chart for a repeatable process in your program. You have discovered that the seven most recent measurements are all on the positive side of the mean in your control chart. W

The correct answer is C. Rule of Seven. The Rule of Seven (also called the Seven Run Rule) is a statistical quality control principle used with control charts. If seven or more consecutive data points appear on the same side of the mean (all above or all below), even if they are within the upper and lower control limit

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Question

You have created a control chart for a repeatable process in your program. You have discovered that the seven most recent measurements are all on the positive side of the mean in your control chart. What is this phenomenon called?

Options

ARule of Improvement
BMean Improvement
CRule of Seven
DLow-Riding Mean

How the community answered

(31 responses)

A
3% (1)
B
6% (2)
C
90% (28)

Explanation

The Rule of Seven (also called the Seven Run Rule) is a statistical quality control principle used with control charts. If seven or more consecutive data points appear on the same side of the mean (all above or all below), even if they are within the upper and lower control limits, the process is considered out of statistical control. This non-random pattern signals a systematic cause that should be investigated, even though no single point violated the control limits. Answer: C - Rule of Seven.

Topics

#Control Charts#Quality Control#Rule of Seven

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