Prototyping Beyond the Sunshine Scenario
Prototypes often model one flow of interaction--the path that users are most likely to take. But when we create interaction designs with dynamic and complex flows, we often need to include deviations from the sunshine scenarios to see whether they work. In this article, we'll look at how to do this Visio and Axure.
Olsen, Henrik. GUUUI (2006). Articles>User Interface>Interaction Design>Methods