An out-of-control (OOC) signal occurs at the 9th sample in the ??? chart given o

Question

An out-of-control (OOC) signal occurs at the 9th sample in the ??? chart given on the right. Which of the Western Electric Rules for OOC is/are satisfied by that point?

An out-of-control (00C) signal occurs at the 9th sample in the X chart given on the right. Which of the Western Electric Rules for OOC is/are satisfied by that point? Circle all that are satisfied. A. One point falls outside a 3-sigma limit on any side of the center lne B. Two out of three consecutive points fall outside a 2-sigma limit on 6. X Chart aWn the same side of the center line. CL-H C. Four out of five consecutive points fall outside the 1-sigma limits onovm one side of the center line. Eight consecutive points falls on the same side of the center line· D. Non 1 23 45 67 8 910 Sample

Explanation / Answer

6. A) Here the 9th sample lies beyond 3-sigma limit on the upper side, so (A) is applicable.

B) Here 7th and 9th lies beyond 2-sigma line on the the upper side, so (B) is also applicable.

C) Here 5th, 6th 7th and 9th sample lies beyond 1-sigma line on the same side i.e upper side. so, (C) is also applicable.

D) Seven consecutive points were on the same side before the 8th sample, so (D) is not applicable for this problem.

So,A,B and D are applicable.

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