Despite development of innovative safety and risk management tools in the aviation industry, there remains the threat of accidents caused by human factors. Many tools have been developed to address the threat of human factors in aviation systems. The Human Factors Analysis and Classification System (HFACS) was created to categorize human factors based on the level of the organization where the factor originated. In this research, the HFACS has been combined with an analytical tool, the Fuzzy Analytical Hierarchy Process (FAHP), to create an analytical HFACS. The FAHP ranks variables from a system in order of relative importance based on qualitative inputs. The HFACS/FAHP combines the judgments of multiple experts on the relative importance of human factors in the accident sequence and converts these judgments into relative importance values that may provide additional insight for accident investigators.


human factors, aviation, fuzzy logic, fuzzy analytical hierarchy process, human factors analysis and classification system

Date of this Version



Aviation Technology

Month of Graduation


Year of Graduation



Master of Science

Advisor 1 or Chair of Committee

Donald A. Petrin

Advisor 2

Denver W. Lopp

Advisor 3

Michael W. Suckow