Whenever I say the word Revit people assume I'm talking Building Information Modeling (BIM). Most people I know think Revit is BIM. I'm sorry to tell everyone, but Revit is not BIM. Revit is one of many BIM tools. Autocad MEP is also a BIM tool as well as Archicad, Navisworks, and even Microstation.
Revit is 3d/2d Modeling program that has a powerful database at it's core. I know, "Isn't a building database essentially what information modeling is?" Don't get me wrong Revit is one of a handful of programs that is kick starting the BIM movement. Right now it is mainly used by designers & contractors, therefore it's only being used for the upfront part of the building process. But BIM is suppose to be for the life cycle of the building. BIM is not just for figuring out the initial cost of the building. It is not a tool just to figure out what the building looks like. BIM is about both of these items plus it is about information. I've said this before, but BIM is a digital representation of the physical structure as such it should have all of the data about the building stored in it's database. Revit does that right? Yes it has the capability to input all of the data that pertains to the building as long as all of those parameters are built into the model, and documented.
Let me ask you this, when you are adding your roof system to your Revit model are you filling out who the manufacture of the roof will be, are you documenting who the contractor will be, are you documenting who the consulting engineers are, are you documenting the make and model number of the paper towel dispensers. For most people I know they would answer those questions as an emphatic NO of course not, that information is in the specifications we don't need to put it in the drawings. Information is the key word there, Building Information Modeling should be a repository of all of the digital information that makes up the physical building in one place.
So lets say five years down the road the building god forbids has a water leak and some of the ceiling tiles were damaged. The owner of the building has to go to his storage room and hope he kept all of the shop drawing and warranty information that the contractor provided him, so he can contact the right people to first fix the roof and second to replace the ceiling tiles. This could take days just to find the correct information. With BIM this information is right in the database of the model. The owner open the model selects the roof, and with in it's properties it shows manufacturer of the roof, it shows the length of the warranty, and a date when the warranty is up. So BIM is much more than Revit.