Large projects are not handled by a single designer and so correspondingly, a large project should not reside in a single DWG. Sounds logical, but how do you divide up a large project so that many designers can work together as a team. Split it up into lots of DWG's! Sounds easy, but how?
This topic will give you some ideas as to how to organize your Plant 3D project so that the project remains as a single project for reporting and yet has many drawing / model files, so that designers of different disciplines can work together and yet work with manageable data sets so that modeling response remains good. The way we will do this is through extensive use of XREF's.
And just as no two projects are the same, there are many different ways to organize a project. We'll suggest one way, but you can modify these suggestions in order to suit your project better.