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This paper discusses the state of the art in the reliability analysis of human operators. Such analyses generally comprise human reliability assessment (HRA) in Man-Machine Systems (MMS) and involve the description of available human behaviour models. In the given context, man-machine systems represent the actual interaction between a human operator and a technical system. The authors introduce systems where the human factor plays an essential role and the failure of a human being could lead to a safety hazard. Currently, the quantitative evaluation of human reliability is based on the total probabilistic safety analysis (PSA) of the entire MMS.

This article discusses the possibilities of obtaining new information related to human behavior, namely the changes or progressive development of pilots' abilities during training. The main assumption is that a pilot's ability can be evaluated based on a corresponding behavioral model whose parameters are estimated using mathematical identification procedures.The mean values of the identified parameters are obtained via statistical methods. These parameters are then monitored and their changes evaluated. In this context, the paper introduces and examines relevant mathematical models of human (pilot) behavior, the pilot-aircraft interaction, and an example of the mathematical analysis.K e y w o r d s: pilot model, modeling of human behavior, identification, MATLAB, flight simulator

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