If the process standard deviation increases, how will the cusum chart for monitoring process variability indicate the out-of-control state?

The value of S i + will decrease

The value of Si will decrease with decrease in the value of Si+

If the process standard deviation increases, how will the cusum chart

1.	If the process standard deviation increases, how will the cusum chart for monitoring process variability indicate the out-of-control state?
A.	The value of S<sub>i</sub><sup>+</sup> will increase
B.	The value of S<sub>i</sub><sup>+</sup> will decrease
C.	The value of S<sub>i</sub><sup> </sup> will decrease with decrease in the value of S<sub>i</sub><sup>+</sup>
D.	The value of S<sub>i</sub><sup> </sup> will increase
Answer» B. The value of S<sub>i</sub><sup>+</sup> will decrease