Making Personas More Powerful: Details to Drive Strategic and Tactical Design
http://www.boxesandarrows.com/view/making_personas_more_powerful_details_to_drive_strategic_and_tactical_design

Olsen, George
Boxes and Arrows
2004

Abstract:

Personas ought to be one of the defining techniques in user-focused design, but they've unfortunately become more of a check-off item than a useful tool. So how did we get here?