Temporal Aspects of Tasks in the User Action Notation

Hartson, H. Rex and Gray, Philip D. (1990) Temporal Aspects of Tasks in the User Action Notation. Technical Report TR-90-12, Computer Science, Virginia Polytechnic Institute and State University.

Abstract

High software usability stems from good user interface design. Good designs invariably depend on an ability to understand and evaluate (and thereby improve) interface designs in the development process. Understanding and evaluating designs depends, in part, on the methods used to represent the designs.