Creating a decision set
You can create Decision Sets from Modeler and the Variant Selector.
To create a decision set from Modeler:
1. Right-click the Package (or the Model) that is to own the Decision Set, and select > > .
2. Type the name of the Decision Set, and then press the Enter key.
After creating a Decision Set you can choose which Variants to include and exclude through the Decision set editor or through the Variant Selector.
To create a decision set from the variant selector:
1. Click the Create new Decision Set button: 
2. From the dialog, type the name of the Decision Set you want to create, and then click OK.
After creating the Decision Set, the Variant Selector selects that Decision Set for you to choose which Variants to include and exclude. See Choosing Variants to Include and Exclude Through the Variant Selector.