User-Centered Design 101 (Why User-Friendly is Not Enough)
http://www.screenspace.org/?p=115

Bowie, Jennifer L.
Screen Space
2009

Abstract:

While system-centered places the system and programmer at the center of the design, and user-friendly considers the users, user-centered design put the user at the center of the design. What better way to design for the real needs, tasks, skills, knowledge, and behaviors of the users?