With the release of Revit Structure 1, then 2, along with the release of Revit Building 8.1 we got a new tool called Copy/Monitor. This feature allows two projects, one Revit Building and one Revit Structure to copy and monitor Levels, Grids and columns so we can keep these coordinated between our separate projects.The workflow? The architect passes a building project to the structural engineer using Revit Structure and they Copy/Monitor Levels, Grids and Columns to save the effort of creating them in the first place and to permit Revit to keep an "eye" on them so any changes can be coordinated.
An interesting side effect is you can use this feature between two Revit Building projects internally if you like. So you can put your structural model in a separate project to remove that data from your architectural model to improve performance perhaps. You can still provide this model as well as the building project to a consultant if you like. The upside is you can have actual grids in the architectural model, copy/monitor them into your separate structural model just as if you were the structural consultant.
The Coordination Review tool allows you to see if any changes to these three categories has occured and decide to accept, reject or postpone a decision regarding any changes reported.
I'll dig into the details of this feature more next time out.