Abstract
We propose a method for supporting conceptual design by using computer. This method generates creative candidates for novel design of physical systems. First, physical causalities are generated by exchanging variable-relations of normal physical causalities which are acquired by analyzing existing objects. New physical causalities are organized into candidates for design solution. Although some of the candidates yielded by proposed system may not be able to materialize, others have the potential for obtaining novel designs. Moreover, the candidates that have some problems to materialize by the present technology can focus designers' intentions on the problems to work out in order to attain a novel design.