Control Chart

  1. If 7 pts out of mean? Answer: Out of control
  2. If a control chart displaying showing 6 points above mean then ?

 1 - It breaks the rule of seven and the situation is out of control. It requires investigation of root cause.

 2 - Nothing

6 data points above the mean/7 consecutive data points below above mean(?)

 Page 196 PMBOK For a repetitive processes the control limits are normall +/- 3 sigma. A process is considered out of control linit or if 7 consecutive are above or below the mean.