There Are Several General Guidelines Associated with the Zones for Identifying

Multiple Choice

There are several general guidelines associated with the zones for identifying patterns in a control chart, where none of the observations are beyond the control limits. Which of the following is NOT one of those guidelines?

A) Fourteen points alternating up or down.
B) Two out of three consecutive points in Zone A (on one side of the centre line) .
C) Three out of four consecutive points in Zone B (on one side of the centre line) .
D) Four out of five consecutive points in Zone A or B (on one side of the centre line)