You can create assemblies that are precise and reference a speci fic revision of each
component; you can also create dynamic assemblies in which current revision rule
determines the con figuration of the assembly. Dynamic assemblies are sometimes
referred to as imprecise assemblies. The hierarchical structure relationship between
the immediate parent assembly and its child component item or item revision
in a precise assembly is represented by an occurrence (sometimes called relative
occurrence). For more information about precise and imprecise assemblies, see
chapter 2, Building and Maintaining Product Structure.
You can de fine sophisticated revision rules that allow you to con figure the structure
in different ways. This allows you to create a single structure and reuse it many
times, for example, for different versions of the product. Revision con figuration
depends on the release status of an item revision, and its related effective date,
effective unit number, or the release date. It allows you to reproduce a con figuration
that was effective at a certain date in the past or recreate the con figuration of
a speci fic unit. For more information about using revision rules, see chapter 5,
Con figuring Product Structure With Revisions.
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