“Usability can sometimes be more about belief than about evidence or engineering, with usability testing heading the list as a central tenet of the dogma of modern practice. (…) Yet, precisely because of its leading role, it is important for the profession to question the dogma of usability testing and for professionals to keep abreast of new developments and changing perspectives.” (Larry Constantine – Usability News)

“The purpose of this article is to explain the Practical Review System (PRS). The PRS is an outline of 28 characteristics that can be used to understand any usability method, thereby allowing any individual to decide between methods. This solves many of the problems associated with understanding and explaining usability methods.” (John S. Rhodes – WebWord)