Dimensions of Usability: Defining the Conversation, Driving the Process
http://www.wqusability.com/articles/5es-upa2003.pdf

Quesenbery, Whitney
WQusability
2003

Abstract:

Have you ever wondered if your colleagues or clients really understand usability? Too often, standards or guidelines substitute for really engaging our business, technical and design colleagues in a discussion of what usability means. By looking at usability from five dimensions, we can create a consensus around usability goals and use that definition to provide the basis for planning user centered design activities.