#### Subgroup Chart

This chart type requires the selection of Feature Variables or Dimension Variables. If the Feature list or Dimension list is displayed in the side bar, this chart icon will be grayed out. Access the Feature Variable or Dimension Variable list in the side bar, and apply some features to the tabbed window to display this chart type.

Subgroup Charts show subgroup range, subgroup median value, subgroup mean, and/or subgroup standard deviation. Two additional statistical parameters, CP and CPK, also appear on the chart.

Available Subgroup Charts are the XBar & R Chart, XBar & S Chart, and XTilde & R Chart.

Just same with Individual Chart you can control the number of individual observations per subgroup by using subgroup parameters.

You can change the type of subgroup chart displayed by using the Configure Charts dialog box described in the "Control Charts" topic.

Sample Chart

See also:

- XBAR & R Chart

- XBAR & S Chart

- X Tilde & R Chart

- Subgroup Parameters

- Control Limits

- Capability Indexes: Table of Calculations

- Chart Display - Control Chart