There Are Several General Guidelines Associated with the Zones for Identifying

question 107

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)