The following is a typical workflow for using linked models. Your implementation may differ depending on your project needs.
To link models
For example, for a campus, create a separate project for each campus building. For a large building, create a project for each separately managed piece of the project. If a large building has 2 towers, for instance, create a separate project for each tower.
When you link models to the main project, you can share the coordinates of the project so that you can correctly position the model. See Shared positioning.