ABSTRACT

Critical path analysis (CPA) is a project management technique which allows consideration of the effects of multiple tasks on overall performance time. CPA has been used as a means of modelling user performance. In this paper, CPA is used for performance modelling, predicting transaction time and as a means of generating hypotheses concerning human performance. Predictions are shown to lie within 12% of times obtained from experimentation (at the 5% significance level). CPA models allow inspection of the effects of different tasks on performance.