Enhanced operator function model: A generic human task behavior modeling language

Task analytic models are extremely useful for human factors and systems engineers. Unfortunately, there is no standard language for describing task models. We present an XML-based task analytic modeling language. The language incorporates features from operator function model and extends them with additional task sequencing options and conditional constraints. This language's use is illustrated via a radio alarm clock example. In addition, parsing, visualization, and development tools are discussed.