#42

According to Shewhart's tests for runs, which of the following would be evidence of assignable-cause variation?

A	A group of five or more points below the centerline followed by a sudden jump of at least one (1) standard deviation band.
B	14 points in a row that are within the control limits
C	A change in any one, or more of the 6M's (aka 5M's and one P)
D	A point plotted outside of the specification limits