This article summarizes statistics for 13 usability laboratories. It also gives an introduction to the main uses of usability laboratories in usability engineering and surveys some of the issues related to practical use of user testing and computer-aided usability engineering.| Nielsen Norman Group
Using Discount Usability Engineering to Penetrate the Intimidation Barrier,' paper by Jakob Nielsen on simpler and cheaper ways to a better UI;with examples of fast usability projects.| Nielsen Norman Group