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Abstract
A short system analysis of the air traffic control systems with respect to their purpose and realization shows the role which the human operator plays. The task of man in this system can be determined as information processing. Evaluation of these tasks is important for selection of personal, for job evaluation, and for redesigning tasks and jobs in order to fulfill the tasks of ATC in future. This evaluation of man's tasks can be regarded either from the demands of the job or from their fulfillment and effect for man. Both aspects have to be connected to get objective results which are valid for man. Special research problems arise from the influence of the individual abilities and from the correlation of stress as work load factor and strain as effect of this work load on man.
