I was at a seminar presented by Phil Read the other day. He mentioned about using linked revit files to create design options. This seems like a very good idea.
The problems we have had with Design Options is that once we choose an option over other, Revit deletes everything related to the deleted option. Design Options also had its own rules and complicated the main project file with lots of views, objects, etc. Creating new central files out of the project to make 4 or 5 design option seemed to work ok, as long as the main project file is NOT concurrently developed.
Linking a separate RVT file as a design option does not clutter the main project file. It allows the main project file to be developed concurrently. After finalizing the option, we can just convert the linked file into a Group! (The new Revit 2009 feature of the linked RVT file being able to define a room, is a great improvement!) We can keep the other design option, even after we select the favorite one!
May be one day Autodesk will do away with the Design Option?!