When working with a skeleton model in an assembly, Creo Parametric generates Bill of Materials (BOM) information and mass properties information that accurately reflects the design models and either the default or user-specified mass properties. However, the assembly BOM and assembly mass properties ignore skeleton models entirely when working on parts.

To obtain the full BOM or the mass properties of the Master Representation while working with a simplified representation, you must switch to the Master Representation. Creo Parametric includes included components in mass property calculations because they are in session. It does not include excluded components unless they are in session. Mass properties only reflect what is currently on the screen.

The BOM lists all components of assemblies that are in session. Unless the Master Representation is in session, the BOM is not accurate. Pro/PDM provides the full BOM without retrieval of objects.

For substituted objects, Creo Parametric has access to the names of both the original object and the substituted object. The mass properties of the substituted component are available because the component is in session. If they have been assigned through Interchange mode, the mass properties of the original object are available in the substituted component.