Abstract
In cooperative design activities by a design team, designer needs not only design object information but also design rationale. In order to improve CAD to become means of more widely used information transmission, integrated methods for description and management of design information and rationale are proposed. Two approaches are introduced to construct the management method. First approach is the method oriented to transmit design rationale as a reaction which is taken by CAD system according to design condition. Second approach is the method based on the thought that design rationale can be obtained from designer's action during design process, and the method of estimating design rationale from design cases and the traces of using design cases is proposed. This paper focused on property/attribute relation among parts in design object, and proposed transmission and derivation method of these relations. The last part of this paper, the outline of integrated system which recommends design alternative considering property/attribute relation and design rationale underlying the relation is discussed.
