Feature-based similarity assessment of solid models

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Abstract
This paper presents our initial efforts to develop a systema tic approach for assessing the similarity of solid models based on how they will be manufactured. The goal of this work is to develop methods that, given a solid model representing the design of a new product, query a product information database (of solid models, associated manufacturing plans, and related attributes) and identify existing designs with man- ufacturing plans similar to some reasonable plan for the new design—or useful as a starting point for creation of a new plan for the new design. Our approach is based on the automatic generation (from CAD models) of graph structures that contain manufacturing information (in the form of manufacturing features). We are developing ways to measure similarity among these graph structures, so that given the graph structures correspondi ng to two different designs, we can tell how similar or differen t they are. The similarity measure will be used as a basis for indexing and retrieving similar designs from databases. An implementation of our approach is discussed. We believe our work is a first step in producing computer- generatable and computer-interpretable similarity asses sment techniques that will be useful for applications such as vari -

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