Context modelling for a usability oriented approach to interactive systems requirements engineering

The paper investigates the needs of organisational context modelling within a usability-oriented approach to interactive systems requirements engineering. Task models usually produced during the requirements engineering process are derived basically from an analysis of the the users' individual tasks. Consequently, some major usability problems in interactive tasks performing arise from a lack of the organisational context modelling. The TOCO (task organisational context) model is proposed and then an example of context modelling using TOCO is presented.