When we examine and s charts,what is the best strategy to use?
A)Start with the chart and only examine the s chart if a point is out of control.
B)Start with the s chart and ignore the chart unless the s chart is in control or until any special causes for lack of control in the s chart have been found and removed.
C)Examine both simultaneously and only declare a point out of control if it is outside the control limits on both charts.
D)Examine both simultaneously and only declare a point out of control if it is outside the control limits of the chart but within the control limits of the s chart.

Question

When we examine  and s charts,what is the best strategy to use?
A)Start with the chart and only examine the s chart if a point is out of control. 
B)Start with the s chart and ignore the chart unless the s chart is in control or until any special causes for lack of control in the s chart have been found and removed. 
C)Examine both simultaneously and only declare a point out of control if it is outside the control limits on both charts. 
D)Examine both simultaneously and only declare a point out of control if it is outside the control limits of the chart but within the control limits of the s chart.

Quizplus · Accepted Answer

The Answer is B

When We Examine and S Charts,what Is the Best