Unified modeling of human operator activity in a real-world environment

A method of unified modeling of human operator performance is presented. This method is based on activity theory, object-oriented analysis and design, and uses theory of frames, modal logic, and results of psychological experiments. It takes into account personal and social factors of operator activity, his conscious and unconscious motives, as well as organizational and technical components. The suggested approach was realized in aviation for pilots´ and air-traffic controllers´ error investigation, where the decision support system was constructed. To demonstrate how this system can help the investigator to make conclusions about underlying causes of accidents/incidents the example from commercial aviation accident investigation is considered.