This new approach will permit in the future to ask

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Unformatted text preview: l of information of a non-ideal feature. An extraction is an operation used to identify specific points from a non-ideal feature A collection is an operation used to consider more than one features together. An association is an operation used to fit ideal feature(s) to non-ideal feature(s) according to a criterion. A construction is an operation used to build ideal feature(s) from other ideal features with constraints. Characteristics Characteristics, useful to the definition of specifications, belong to five families: • Intrinsic characteristic • Situation characteristic between ideal features • Situation characteristic between ideal and limited features • Situation characteristic between ideal and non-ideal features • Situation characteristic between non-ideal features Summary The model is mainly based on operation and characteristic concepts. These concepts are developed to obtain a small set of operations and characteristics to describe the quasi totality of current specifications (standardized or not). This mode...
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