Borsuk S. Ergonomic basics of human factor expressing pattern proactive qualimetry in aeronautical systems

Modern problems of human factor influence on flight safety are determined. Taking into account ATCs understanding of hazard it was determined the leading part of indexes of their attitude to hazardous actions or circumstances during decision taking. This attitude influence upon other ICAO flight safety concept components interaction was also examined. It is grounded that human factor occurrence characteristics during decision taking in air navigation systems are main solution taking dominants, desirability levels and fuzzy risk estimates. This defines match/mismatch of blocks “liveware - procedures” in SHELL model recommended by ICAO for systematic research of human factor problem. Basing on system analysis principles, criteria for determination and rationality of decision making systems, classification signs of solution taking tasks there was developed theoretical basics and structure of ergatic systematic-information qualimetry of human factor during decision taking by ATC personnel in air navigation systems. System aspect of qualimetry was determined on the base of air navigation system peculiarities (structure, dynamic, determination, arrangement etc.) and workplace properties. Special feature of measured indexes (main solution taking dominants, desirability levels and fuzzy risk estimates) is their proactivity, which positively influence ATCs in their correct attitude about hazardous actions or conditions in professional activity. Human factor qualimetry methodology during ATC decision taking at risky circumstances of flight norms violation was rationalized. Risk formalization was performed and existing problem situation model was extended with special set. Main solution taking dominant (tending, indifferent, non-tending to risk) determination method was developed. Method is based on limited number of usefulness estimation functions points for flight level norms in closed decision taking task. Risk premium determination method is improved during usefulness estimation functions analysis. Efficiency of the method is increased by 17,8 %. Taking into account that desirability level is main systematic factor of personality and it’s self-esteem correctness, the method of it’s determination was improved. It was performed for the flight level norms continuum by solving open solution taking task and constructing usefulness estimation functions with formally unlimited number of key points. The Cooper-Harper scale was adapted with the implementation of “support matrix” to construct the membership function of a linguistic variable “risk level” with smooth slope. Peculiarities of “very” modifier was determined to build fuzzy risk estimation scale. The fuzzy union operation was applied to reduce the scale down to the size proposed by ICAO.