Abstract

A human factors (HF) evaluation, carried out as part of the development of a set of computer-aided software engineering (CASE) tools, is presented and is used as an example of the processes and products of typical HF evaluation practice. The role of HF evaluation as a part of software quality assurance is identified, and typical current practice of HF evaluation is characterized. The details of the particular evaluation are then reported. First, its processes are described; these are determined by relating features of the system under development to the desired focus, actual context, and possible methods of the evaluation. Then the products of the evaluation are described; these products or outcomes are formulated as the user-computer interaction difficulties that were identified, grouped into three types (termed task, presentation, and device difficulties). The characteristics of each type of difficulty are discussed, in terms of their ease of identification, their generality across application domains, the HF knowledge that they draw on, and their relationship to redesign. The conclusion considers the usefulness of the evaluation, the inadequacies of system development practice it implies, and how to incorporate HF evaluation into an improved system development practice.

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