Interactive feature definition

Present feature based CAD systems do not offer a facility to easily define one’s own features, if they offer such a facility at all. The reason why present software tools are inadequate for feature definition is that defining features requires a lot of programming skills, making feature definition an error prone and difficult task. The people in charge of defining new features usually can be regarded as domain experts in the fields of design or manufacturing or both and not as programming experts. This chapter therefore elaborates on interactive feature definition, aiming at facilitating the definition of features by non-programming experts. Interactive feature definition is applied in a prototype of a re-design support system, called FROOM, in order to support feature based design. However, the feature definition as presented in this chapter can also be used in a computer aided process planning system for defining features to be recognized. Conceptual graphs are used as an aid in the defmition of features and for representing the features.

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