I work for a medium size engineering consultancy and we have been using Revit now since 2009. We are relatively intermediate level users and still are not fully using Revit to its full capacity.

I know the standard ways of recording changes to a 2D drawing (Changes description within a new issue) but can you all tell me your ways in which your company records changes to a 3d model ?

So if a contractor or manufacturer would open up our model, how would he/she know what changes have been made to the model in Revit?

Thank you for your time