This document discusses techniques for simplifying large assemblies in SolidWorks. It describes when to use simplified assemblies, such as for assemblies with many features, embedded components, or unique parts. It outlines two main methods for simplifying assemblies: the simplified assembly model and simplified assembly visible faces approaches. The simplified assembly model uses solids and is fully associative, while simplified assembly visible faces prioritizes appearance and uses surfaces. The document also covers the limited update/save options, component tracker tool, and file opening behavior in the context of simplified assemblies.