e the
control limits; two out of three consecutive points outside the 2 sigma warning limits but still
inside the control limits; four out of five consecutive points beyond the 1 sigma limits but still
inside the control limits; a run of eight consecutive points on one side of the center line but
still inside the control limits; six points in a row steadily increasing or decreasing but still
inside the control limits; fourteen points in a row alternating up and down but still inside the