You can create Decision Sets from Modeler and the Variant Selector.
After creating a Decision Set you can choose which Variants to include and exclude
through the Decision set editor or
through the Variant Selector.
1. Click the Create new Decision Set button:
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.