Both myself and a colleague are used to using Windchill where you can look look at file and check it into a workspace folder. Here, you can search for assemblies easily and more importantly search for any assemblies are work in progress.

Current setup I have, is a master assembly holding lots of sub assemblies that also have lots of sub assemblies inside them, the search cannot seem to drill any deeper than the folder structure so will not go passed the 1st tier.