Evaluation of human fitness for duty in a real working situation

According to the results of root causes analyzes in the complex highly atomized systems almost 80% of reported events and scrams are due to the human error or malfunction. Nowadays scrams are mostly consequences of human mistakes. Human mistakes are according to the results of root cause analyses consequences of unfitness or inability to perform demanded task. Most of the workers in the system have adequate psychophysiological abilities and basic knowledge. So their performance in a real working situation depends on their fitness for duty or actual availability. Actual availability and consequently human performance depends on: Human abilities (basic human traits); human knowledge (knowledge received in education process and in special training); human motivation (willingness to take part in the activity). Actual availability is the interference of abilities, knowledge and motivation in the real situation and it shapes human performance. Workers are able to self estimate their fitness for duty. On these estimations modelling of human performance in a real situation is possible. By the level of human performance system's performance should be predicted. We have developed questionnaire VTP for self estimations of well-being, mood, fatigue, arousal level, stress and motivation. At the same time data indicating human performance have been collected. Indicators of human performance have been the results on dual task and effectiveness in primary task. Connections between human fitness for duty and human performance have been modelled. Developed model explain the impacts of particular factors of fitness for duty on systems performance. (author). 5 refs, 1 tab