Abstract
Only two levels of adaptation are used in the most present human engineering projects of information display systems—total and contingent. At the same time experimental and theoretical analysis of the statistical relationships between structures of information display and values of psychological factors of complexity of operators' problem solving shows that three additional levels of adaptation are necessary. There are group, individual and individually—operative levels. Some mathematical methods of evaluation of optimal distribution of information displays between individuals operators, combinations of man with different individual characteristics in one operators group are worked out.
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