a) One or more points near a warning limit/control limit
b) One point plots outside 3-sigma control limits
c) Eight consecutive points plot on one side of the control line
d) Two of 3 consecutive points plot beyond the 2-sigma warning limits
Which of these is not one of the sensitizing Western Electric rules that indicate “action needed” for Shewhart control c
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Which of these is not one of the sensitizing Western Electric rules that indicate “action needed” for Shewhart control c
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