This part of ISO 10303 specifies the resource constructs to manage the structure and configuration of a product during its life cycle. The following are within the scope of this part of ISO 10303: — the relationships among the components and assemblies of products; — the relationships among products and their components as made by modification of other products; EXAMPLE 1 The machining of a product from another product is an example of a modification. — the description of a product as defined by customer needs; — the dependencies among specifications of a product in order to represent possible product variations to present to a customer; — the management of the structure for configuration of assemblies and components as planned for manufacture; — the decomposition of a product to support different product life cycle activities; EXAMPLE 2 An organization maintains one bill-of-material structure for a product that enumerates the quantity of each component used in each assembly, and a second bill-of-material that decomposes a product with multiple assemblies into the individual components. See annex E for more examples of different product structure reports that are supported. — multiple versions of a single product that are equivalent with respect to form, fit, and function. The following are outside the scope of this part of ISO 10303: — the relationships among different product definitions for the same product; NOTE 1 The relationships among different product definitions for the same product are supported by the product_definition_schema of ISO 10303-41. EXAMPLE 3 The relationship of a product definition for a component in a preliminary design to a corresponding product definition for the same component in a detailed design is an example of this type of relationship. — administrative activities of the product life cycle including approvals, security classifications, contractual arrangements, and supplier organizations; — the change process for a product, including the reason for change and what aspect of a product has changed; — the decisions made, and their reasons, during the product life cycle; — the physical connections among components of a product; — the properties that a product constituent may have; NOTE 2 A mechanism is defined in the product_property_definition_schema in ISO 10303-41 to support the association of properties with components. The actual associations are included in various application protocols that are parts of this International Standard. For example, the details of what a material property is and how it is defined are out of scope, as well as the fact that a component has a material property. — multiple versions of a single product that are not form, fit, and function equivalent. NOTE 3 The concept of versions of a product is defined in the product_definition_schema in ISO 10303-41.