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Re: Revit - Linking Model or Sharing the Same Model
A couple things affect this decision; technology and culture.
The IT infrastructure has to be configured to support it. Separate firms do not usually share a common IT system so it is necessary to decide how to deal with that. It can be done via Remote Desktop, a shared server domain (Private Cloud) or a hosted cloud service. Autodesk provides Revit Server to help deal with this if you go the private cloud route.
Culture and process affects it because deliverable deadlines may not support concurrent access to the model. It may also be unacceptable to one firm or both to let users from the other firm have such immediate access to each other's data. If your firm doesn't allow another firm to alter your CAD files then this is the same issue.
If the architectural team works right up to their design submission deadline it doesn't leave you much time to produce your work for your deadline because they will start in on their next deadline while you are reacting to their previous work still. The design may never settle down enough to let you print a static progress set. The established habit of working on a set of progress prints they provide is more "normal". Are you prepared to stay on the job every day instead of for a full week after they submit their progress set?
There is a lot to gain from working along side one another in the same model. You will have to be prepared to work through the issues that arise.