Abstract
This paper deals with geometrical specifications, more particularly, with the geometrical concepts used.
The answers to the following questions are approached: Why do we need specifications? What is a geometrical specification? What is specified? What are the geometrical features used? What are the characteristics?
A review of specification shows their diversity, but also the common geometrical bases. Even if the diversity of specifications is great, a specification could be considered as a characteristic limited in a given range, this characteristic is defined on one or more features and these features are obtained from the “skin model” by some basic operations which are common to the different types of specifications.
The main difference between the specification is based on the level of filtration of the skin model. The errors which are specified depend on the level of filtration. This global view homogenise the specifications from the micro geometry to the macro geometry.
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Ballu, A., Mathieu, L., Dantan, JY. (2003). Global view of geometrical specifications. In: Bourdet, P., Mathieu, L. (eds) Geometric Product Specification and Verification: Integration of Functionality. Springer, Dordrecht. https://doi.org/10.1007/978-94-017-1691-8_2
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DOI: https://doi.org/10.1007/978-94-017-1691-8_2
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