ABSTRACT
Falzon (1990) argues that cognitive ergonomics is the sub-field of cognitive science especially concerned with human task-oriented activity. Much human task-oriented activity is now undertaken using interactive computer systems and therefore, cognitive ergonomics and human computer interaction have closely related concerns. In HCI evaluations are conducted in order to assess the effectiveness of human task-oriented activity supported by computer. However, the process of evaluation should also provide the basis for improving the design by generating redesign requirements. Unfortunately, a common complaint from practitioners is that while these methods might be good at identifying usability problems, they do not begin to provide solutions to the problems identified. This paper is specifically concerned with the generation of user requirements as a result of conducting discount usability evaluation studies using heuristic evaluation and cognitive walk-through. The requirements generated by the different evaluation methods are outlined and discussed.
