Comparing telephone-computer interface designs: Are software simulations as good as hardware prototypes?

Widespread interest in the evaluation of human-system interfaces has led to the development of various techniques in usability engineering. Usability evaluations are usually carried out on interface prototypes. However, if the design involves hardware implementation, such as a special keypad or a control panel layout, producing hardware prototypes for evaluation can be expensive and time-consuming. One solution to this problem is to use …