The Migration Viewpoint specifies the transition from an existing architecture to a desired architecture using the concepts of plateau and gap elements.
•A Plateau provides an overview of the state of an architecture.
•A Gap shows the delta information from one Plateau (representing the overview of one state of an architecture) to another Plateau (representing the overview of a ‘to be’ state of an architecture).
The ArchiMate elements that can be drawn on this diagram are: