The main aims of this chapter are to:
Design activities begin once some requirements have been established. The design emerges iteratively, through repeated design–evaluation–redesign cycles involving users. Broadly speaking, there are two types of design: conceptual and physical. The former is concerned with developing a conceptual model that captures what the product will do and how it will behave, while the latter is concerned with details of the design such as screen and menu structures, icons, and graphics. We discussed physical design issues relating to different types of interface in Chapter 6 and so we do not return to this in detail here, but refer back to Chapter 6 as appropriate.
For users to evaluate the design of an interactive product effectively, designers must prototype their ideas. ...