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The evaluation of design alternatives is important phase for quick design decision making and new design concept during collaborative design process, and it is repeatedly processed. To proceed design process in efficiency, the repetition is reduced to minimum. And design must be optimized in limited cost and time. For smooth and fast process lots of design alternatives are provided within the limit of possibility and it must be evaluated appropriately. It is possible to evaluate design alternatives using various design media. This paper describes the characteristics of various design media which have been used for evaluation of design alternatives, and proposes alternative design comparative system based on the findings of case studies.