The S-Chart Is Recommended When:
A)the Control Chart Calculations Needs $\bar{x}$

Multiple Choice

The s-chart is recommended when:

A) the control chart calculations needs to be performed by hand.
B) tight control of variability in the process is required.
C) the $\bar{x}$ -chart is not associated with an R-chart.
D) the sample size for each sample needs to be reduced.