In this paper, automatic modeling techniques in intelligent CAD system
s are discussed and a multi-blackboard based modeling method is presen
ted. It supports modeling with multilevel accuracy and can convert abs
tract symbol-based description of a design object into the desired 3D
model. These characteristics meet the modeling requirements for suppor
ting the overall design process and are suitable for intelligent CAD s
ystems. We implement them in an intelligent chair design system, AUTOC
HAIR. Copyright (C) 1996 Elsevier Science Ltd.