Assignment Action
An Assignment Action is a usage that is used to change the value of a referent feature of a target occurrence. The target is specified as the result of an expression and the referent is specified as a feature chain relative to that target. The new value for the feature is determined as the result of a different expression. When the assignment action usage completes, the referent feature has the new assigned value for the target occurrence.
Creating an Assignment Action usage
To create an Assignment Action usage
1. On the System Structure Diagram ribbon toolbar, in the Actions section, click the 
Assignment Action button.
Assignment Action button.2. On the diagram, click on the space where you want to create the Assignment Action.