Aviation MRO Operators Assessment by SHELL Model

The human factor influences the performance of aviation maintenance services in the dynamic socio-technical environment of aircraft maintenance operations and overhauls. Management’s contribution and capacity to offer the necessary facilities, equipment, spare parts, and labor, together with a convenient environment and maintenance processes, are key performance indicators for maintenance operations. There are numerous ways to measure and assess the human factor in aviation MRO systems. In this research, the SHELL model is used to represent the impact of aircraft operators in the maintenance system. In order to do this, the analytical hierarchy process (AHP) was applied to construct a questionnaire of a two-level hierarchy model based on the SHELL model to evaluate, prioritize the key functions, and rank the significant and crucial maintenance criteria of the present MRO systems, 14 participants of two groups of aviation MRO professionals contributed to this study namely: (i) aircraft maintenance technicians and mechanics and (ii) aircraft maintenance engineers.