Transition to Detailed Design
In this step we develop the appearance concept and often we do that with a metaphor. Choosing a metaphor can help the transition to add more details to the conceptual model. The details can include actions, parameters, and information. Once we have the beginnings of a detailed design, we develop a full, and preferably prototyped, storyboard.
User interface prototype
We reached the phase where we make the transition from the conceptual design to the detailed design. In terms of the layered framework, we are now at the form layer. Simply put, this is the time where our concept takes on a shape with details.