Linked Models
Link models when individual buildings on a campus or different parts of a large building reside in separate project files, or when each discipline works in its own edition of a building model.
Working in a Team
Use worksharing to allow multiple users to work on different parts of one Revit project.
Multi-Discipline Coordination
Use the Copy/Monitor tool to monitor changes to elements across a multi-discipline project, and perform coordination reviews to identify potential issues.