Strategies for Sizing UCD Projects
http://www.usabilitybok.org/organizational/p694

Usability Body of Knowledge

Abstract:

When discussing strategies for sizing UCD projects with consultants, it quickly becomes evident that there seem to be as many strategies as there are consultants. This document will define and describe commonly used strategies, identify each strategy’s scope (i.e., whether it applies to design, research, or evaluation), suggest situations in which each strategy would be best suited, and identify pros, cons, and caveats to its use.