According to Walter Shewhart, _____

Multiple Choice

According to Walter Shewhart, _____.

A) chance causes should be eliminated whenever possible
B) assignable causes could be ignored if they did not cause too much variation
C) the mean, upper control limit, and lower control limit are indicated by horizontal lines in the control chart
D) chance causes could be fixed
E) a control chart has time on the top axis and a plot of sample measurements