This study is concerned with determining the feasibility of introducing a reduced takeoff and landing (RTOL) aircraft into the national aviation system. In considering this problem, a multiple criteria decision model based on the responses of airline executives was developed to describe the RTOL utilization problem. The exact problem that is considered in this thesis is, for a given set of itineraries, determine the itineraries for which aircraft (RTOL or CTOL, conventional takeoff and landing) are to be assigned such that the amount of fuel used, delay and noise levels are to be minimized. These assignments are subject to aircraft, airport, system and budgetary constraints. A decision-making procedure was formulated to solve the decision problem utilizing an interactive, multicriteria programming procedure. This procedure was developed to consider the use of 0-l decision variables. Two example problems are presented. The air transportation systems considered in the examples include (a) six airports in New York State and (b) five major airport hub areas in the north-eastern section of the United States. / Master of Science