The last five years of the 20th century saw a major paradigm shift in the role of human factors in product design. Previously this was seen as pertaining almost exclusively to product usability, but new recognition is being given to pleasure-based human factors. This emphasizes the holistic nature of the experience of person-product inter-action. Wilst traditional human factors approaches tended to characterize the user in terms of his or her physical or cognitive processing capabilities, new huuman factors approaches are concerned with wider lifestyle issues.The quality of a design is judged...