A Synthesis Decision Model for Level of Repair of Civil Aircraft Based on SVIAE-MEE Method

The level of repair analysis plays a key role for aircraft to achieve satisfactory life-cycle cost, in which the maintenance capability, time, cost and other factors should be considered comprehensively. This paper presents a synthesis decision model for aircraft repair level based on the matter-element extension (MEE) method. According to the characteristics of maintenance support system of civil aircraft, both the economic and non-economic factors were considered as inputs for the model. The alternative repair programs were ranked by the MEE method in view of their comprehensive performance. The set value iteration (SVI) combined with anti-entropy (AE) approach was used to eliminate subjective bias during the weight assignment. It is finally shown via demonstration on an example problem that the proposed model is effective and reasonable providing a novel way to evaluate the optimal repair level in the maintenance supporting system of civil aircraft.