Which is a rule of thumb to indicate an out-of-control process on the chart?
A) Single point outside one sigma
B) Two of three successive points outside one sigma on the same side of the centerline
C) Four of five successive points on the same side of the centerline
D) Nine successive points alternating in sign

Question

Which is a rule of thumb to indicate an out-of-control process on the  chart?
A) Single point outside one sigma 
B) Two of three successive points outside one sigma on the same side of the centerline 
C) Four of five successive points on the same side of the centerline 
D) Nine successive points alternating in sign

Quizplus · Accepted Answer

The Answer of Which is a rule of thumb to indicate an out-of-control process on the  chart?
A) Single point outside one sigma 
B) Two of three successive points outside one sigma on the same side of the centerline 
C) Four of five successive points on the same side of the centerline 
D) Nine successive points alternating in sign

Which Is a Rule of Thumb to Indicate an Out-Of-Control