Phases of the Design Stage

This project is a pretty complex one, so in order to go somewhere I think it is important to divide the Design process in Clear phases to work on. This image is a quick sketch of the first idea of the Phase structure from the Design Stage of the e.Moped project.

A good think to do is to define theses phases in detail and to set goals to be achieved in the end of each one of them.

Should we add any think to this Image? Any sugestion of the sub-phases inside each of these phases?