Equipment Hierarchy in HxGN EAM is as infinite as it is implemented differently. Everybody does it differently. Everybody has their reasons to do it the way they do it. Any decision on the equipment hierarchy, or structure as it is often referred to, is the most important decision you will make regarding the implementation of HxGN EAM.
This document describes the underlying principles of the hierarchy, which will give you a guideline on which to base your decisions.