Abstract: This paper proposes a methodology for evaluating and selecting aircraft types in a collective decision setting. It consists of two major phases: (1) evaluation and selection. (2) sensitivity analysis of priority. The evaluation process repeatedly uses the hierarchical structure by which we describe the decision attributes for the aircraft evaluation problem. Then the problem is solved according to the analytical hierarchical processes method proposed by Saaty, i.e, the selection process. On the basis of this hierarchical evaluation set the problem of sensitivity analysis about priority of the alternatives in analytical hierarchical process is discussed. And then the applications of the sensitivity analysis in selecting commercial aircraft are presented in this context. It is especially important to proceed to the sensitivity analysis of priority for some ill structured decision making problem such as the selection of the commercial aircraft types.

Key words: comprehensiw evluutan, aircraft aclection, sensitivity analysis, analytical hierarchical proess