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In this paper, a design approach is presented to determine a reference shape by using decision making process on the preliminary aircraft design. Itemized design criteria and weight factors are proposed. Those are necessary for evaluating alternative shapes of aircraft. The proposed design approach incorporates three decision making steps those using AHP, QFD, and TOPSIS. These wellknown methods help a designer determine both the system requirements and the design criteria. To validate the proposed design approach, a design of Very Light Jet (VLJ) aircraft is applied for finding reference configuration by using the results of conceptual design. According to the results, this procedure can be adopted not only to obtain the airplane shape for satisfying design criteria but also to set the reference design values for corresponding design characteristics such as assessment items, weight factors The contribution of this paper is characterized such that the designer can analyze the system requirements and incorporate them during the design process. Thus, the designer can be able to achieve the design goal while effectively determining alternative shapes in accordance with information provided by the proposed methodology.
Cho et al. (Sun,) studied this question.