ISO 10303-214:2010(E)
4.1.28 specification_control (S7)
This unit of functionality provides the capability to describe products with a large number of variants.
EXAMPLE Examples for automotive products are passenger cars, trucks, busses, or engines or components of these products.
Because of the large number of variants there is no unique identification for each of the variants that could be produced. The main concepts that are used to handle this large number of variants are the following:
- product classes are used to identify sets of similar products to be offered to the market;
- specifications are used to describe characteristics of the products;
- specification categories are used to group similar characteristics of the products;
- specification expressions are used to control the usage of a part within a product and to represent conditions for product classes;
- product functions are used to describe the functional requirements for products and components of products;
- product components are used to describe the common decomposition structure of all products of a product class or of various alternative solutions;
- alternative solutions are used to describe the variants for a product component or for a product function;
- item instances are used to identify an occurrence of a component in an assembly structure, e.g., to identify the elements of an alternative solution;
- configurations are used to link the parts (item instances), alternative solutions, product components, or product functions with their usage cases, i.e., the conditions under which they are used;
- product specifications are used to identify a manufacturable product out of a product class by its specific characteristics (specifications), e.g., a customer order for a car;
- physical instances are used to identify actually manufactured physical parts or products by their lot id or serial number.
Figure 6 illustrates the relationships among these concepts.The following application objects are used by the specification_control UoF:
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