Defining Feature Sets Through Prototyping
http://www.boxesandarrows.com/archives/defining_feature_sets_through_prototyping.php

Quinn, Laura S.
Boxes and Arrows
2002

Abstract:

Defining requirements and features can be a daunting task under the best of circumstances. The Vision Prototype allows the user-centered vision to be seen—and discussed—by all team members and then easily translated into a set of functional requirements.