Displaying stratification in a control chart

Stratify the points on a control chart using colors and symbols to uncover causes of variation the process.

1. Activate the analysis report worksheet.
2. On the Analyse-it ribbon tab, in the Process Control group, click Stratification.
   The analysis task pane Control Chart panel opens, and the Vary point color/symbol check box is selected.
3. In the Color / Symbol drop-down list, select a variable.
4. Click Recalculate.