ABSTRACT
Task analysis involves identifying tasks, collecting task data, analysing the data so that tasks are understood, and then producing a documented representation of the analysed tasks. There are a number of different approaches to task analysis available to the Human Factors (HF) practitioner, including hierarchical task analysis (HTA), tabular task analysis, verbal protocol analysis, goals, operators, methods and selection rules and the sub-goal template method. Task analysis methods have evolved in response to increased levels of complexity and the increased use of teams within work settings. HTA is the most popular task analysis method and has become perhaps the most widely used of all HF methods available. The Goals, Operators, Methods and Selection Rules method is part of a family of human computer interaction based techniques that is used to provide a description of human performance in terms of user goals, operators, methods and selection rules.
