Creating an Exchange Contract Diagram (BPMN)
With the MEGA Service Design option, an exchange contract is represented by an Exchange Contract Diagram (BPMN).
To create an Exchange Contract Diagram (BPMN) from an interaction:
1. Right-click the interaction.
2. Select the associated exchange contract and, in its pop-up menu, click New > Exchange contract diagram (BPMN)

If you work with
MEGA Windows Front-End, you should select "Exchange Contract Diagram (BPMN)" from a specific dialog box. Confirm that the
Diagram initialization check box is selected, and click
Create.
The diagram opens with the exchange contract frame and the two roles representing consumer and the supplier.

A role is an integral part of the object that it describes, and is not reusable. It can subsequently be assigned to an org-unit internal or external to the organization or to an IT component. Examples: client, traveler.