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Appl Ergon. 1995 Apr;26(2):147-51.

A software toolkit for hierarchical task analysis.

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Applied Psychology Group, Aston Business School, Aston University, Birmingham B4 7ET, UK.


This paper describes a prototype software tool that offers support to the human factors specialist using hierarchical task analysis (HTA). The tool provides a direct manipulation diagram editor for HTA and provides high-quality output of analyses, in both graphic and automatically generated tabular form. The tool is implemented in Smalltalk-80 and currently runs on Macintosh computers.


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