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.

Question

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.

Quizplus · Accepted Answer

The statement that the one point outside the control limits on the 11eab14b_c874_7415_9166_35d89d8e3f96_TB5065_11 chart is effective for detecting a gradual shift in the process mean is false. A single point outside the control limits is more effective at detecting a sudden shift or other out-of-control events, while a gradual shift would typically be detected by a trend or shift in the process over time on the chart.

Which of the Following Statements About the Use of Control