The main purpose of all relation maps is to review and analyze relations among the elements and create new elements directly in the relation map. All modeling tools allows you to create the Relation Map Diagram that allows you a rapid review, analysis, and creation of relationships among the elements of the entire model. As example, see the following figure.
The example of Relation Map Diagram. It is created by using the CoffeeMachine sample model that comes only with SysML Plugin.