When practiced correctly, BIM is meant to support collaboration across the facilities life cycle. BIM is the flow of information through a project, from inception to completion and throughout the entire life cycle of a structure.
Unfortunately, the industry is still developing separate models that are not communicating.
... as projects become bigger and more distributed, some teams struggle with the collaborative aspects inherent to BIM.
The utilization of BIM technology can result in improved occupational safety by connecting the safety issues more closely to construction planning.
IFC4 introduces the concept of material profiles, where axis-based components, such as beams, pipes and ducts, can be described by paths and cross-sections of materials, along with offsets relative to the axis and end points.
The journal seems to contain quite a bit of info on NBIMS, NBIMS-US and even IFC4.
Download BIM Can Be a Team Sport | Journal of Building Information Modeling – Fall 2012 | Bradley BIM