But seriously .. what is BIM ?

BIM Stands for Building Information Model. which basically means that we have a model but not just a normal 3D model, it is a model that contains information. so for the computer a wall is not just 2 lines and a hatch, it is a virtual wall with attributes (height, width, material, etc...).

So in BIM we Design rather than Draft ! we design in Plan, Elevation, 3D or section .. any change will be automatically reflected on all the other views . and we can also get lists and schedules .

anyhow this short video might be helpful to get a better idea about ArchiCAD ,BIM ..and Virtual Trace which is a tool we are going to use a lot when dealing with DWG drawings :) !