What is the Control chart factor?
The Control chart factor is the multiplier that determines how many standard deviations above the mean the control chart limit is: SCL = mean + (factor * SD). You can modify the Control chart factor in the Statistical Options dialog box. There are two settings for the Control chart factor based on the number of samples. Also, factors that vary significantly from the default values will be highlighted with a cautionary color and/or limited to a range.