Abstract: At present, the evaluation index for the demonstration program of civil aircraft operation requirement is not comprehensive and complete, which is difficult to identify key indicators that affect the quality and competitiveness of civil aircraft products. Based on the analysis of the operational environment and operational mission of civil aircraft, an index system of operational requirements for civil aircraft is established from six dimensions: aircraft adaptability, aircraft convenience, equipment matching, maintenance rationality, aircraft advancement and dispatch reliability. The index weight is calculated by analytic hierarchy process, the membership degree of the index is determined by fuzzy set method. Indicators are quantitatively calculated combined with the objectivity of index membership and the subjectivity of expert qualitative analysis. A model for evaluating the operational requirements of civil aircraft is proposed, C# language is used to develop the evaluation software of civil aircraft operation requirement index system. An example of B737-800 is used to verify the rationality and feasibility of the evaluation model.

Key words: civil aircraft, operational requirements, fuzzy set, membership degree, comprehensive evaluation model, soft－ ware implementation