I work in the design department of a construction company and we chase a lot of work through creating Revit models so this could range from 1 month to 5 years project duration. Sometimes we are chasing something that will be ongoing like a university campus, that could stay around for many years and be an infraworks model on BIM 360. The shorter projects could be walk in clients, RFP work etc. The type of thing that you find out within a month to 3 months if they have went another direction. Sometimes the client doesn't build now but comes back in a year and we need to unarchive and start working again.
Additionally, our estimating department is starting to look into Revit and ACC etc. Estimating projects that are hard bid lump sum will be out for tender and then if they are a loss would need to be archived. This duration would align with tender periods.
So a bit of everything. If ACC is to be a multidiscipline solution it will need robust archiving and access.
One of the things BIM 360 was seriously lacking was that you had to unarchive to look at the archived project. I hope with ACC the archives will also be viewable by "Non Admin" and without having to unarchive as people frequently need to access and reference through old work and sometimes grab content or files from previous projects.
Thanks,