CADRE: case-based geometric design

Case-based design (CBD) overcomes certain dficulties associated with traditional knowledge-based design systems. When novel designs are created by adapting cases, design integrity can be maintained through careful formulation of adaptation procedures. We describe a prototype design system called case adaptation by dimensionality reasoning (CADRE). Geometrical information is treated through simultaneops consideration of constraints expressed in terms of continuous variables. Coni$lexity is controlled through problem specific (runtime) parameterizations and dimensionality reduction of relevant constraints. Run-time parameterizations also enable effective accommodation of. contextual parameters. Mixing mathematical constraints from different views of the design improves integration bf diverse design criteria. Examples taken from building design are used to illustrate important aspects of the appioach