A control chart consists of several parts. It has two control limits and an average line. The bottom dashed line is called the lower control limit (LCL). The solid middle line is the average of the ...

You can save the control limits for and s charts in a SAS data set; this enables you to apply the control limits to future data (see "Reading Preestablished Control ...

Part one of this three-part series examines the rational for using control technology to reduce process variability ...

You can save the control limits for a median chart in a SAS data set; this enables you to apply the control limits to future data (see "Reading Preestablished Control ...