See "Displaying Multiple Sets of Control Limits". The VREF=, VREFLABELS=, and VREFLABPOS= options are used to display and label the trial limits. You can also pass in the values of the trial limits ...

Special cause variation, I love to see it! That’s because I know I’m about to learn something important about my process. A ...

Example 12.1: Cusum and Standard Deviation Charts See CUSXS in the SAS/QC Sample Library When you are working with subgrouped data, it can be helpful to accompany a cusum chart for means with a ...