Which of the Following Statements About the Use of Control

Multiple Choice

Which of the following statements about the use of control charts is/are FALSE?

A) The one point outside the control limits on the chart is effective for detecting a gradual shift in the process mean.
B) To provide a quicker alarm when the process has gone out of control we can look for other patterns on the chart,such as by adding a runs rule.
C) A pattern such as nine consecutive points,either above the center line or below the center line,can be used as a signal that a process has been disturbed by a special cause.
D) When additional patterns are looked for on a control chart,the false alarm rate,when the process is in control,will increase.
E) A false alarm occurs on a control chart when a plotted point gives an out-of-control signal,but the process is operating only with common cause variability.