Designing for humans
Download sample user interface document in PDF format (File size: 47 KB), a Word for Windows document (File size: 161 KB), or as a zipped RTF file (File size: 107 KB).
Participatory design (and initial design in general) tends to be done at a low degree of resolution. The typical document consists of hand-drawn screens or mock-ups.
At some stage, the design must be converted to a format that is more formal, and better suited for use by developers and others. Moving from mock-up to a formal document encourages the design team to consider proposed solutions in more depth.
Providing a formal specification also minimises the need for developers to second-guess design decisions.