抄録
Through arguments on the design process, it was clarified that the intuitive expression of plan like as "esquisse" is useful although it does not always express the complete information on architectural form, because we can get a complete image from incomplete expression by a kind of association or analogical judgment. A knowledge-base which produces such kind of association or analogical judgment is required in the architectural CAD system. The analogy process is consisted by two sub-processes; 1) finding process of associational rela-tionship between design assignments, 2) association process from given assignments to the other assignments. The above process is formulated as; 1) If the correlational coefficient between two assignments A and B, defined as relative frequency of both assignments among the set of plans designed by same architect, is high then we can find a kind of associational relation (A, B). And we can store a set of these relationship as a know-ledge-base. 2) If an assignment A is given by designer when an associational relationship (A, B) has been obtained, then we can conclude that possibility of such fact that proposition B is true is high. These two processes can be constructed as a computer program. The effectiveness of this correlational analogy model was observed through applications of this model in the system assisting the design of room layout and door details.