Building Information Model (BIM)
A Building Information Model (BIM) is a three dimensional digital representation of physical and functional characteristics of a facility. As such it facilitates the exchange and interoperability of information in digital format about a facility forming a reliable basis for design, construction and operational decisions. The International Alliance for Interoperability (IAI) promotes the use of Industry Foundation Classes (IFC) as a single open standard for BIM.
A basic premise of BIM is collaboration by different stakeholders at different phases of the life cycle of a facility to insert, extract, update or modify information in the BIM to support and reflect the roles of that stakeholder. The BIM is a shared digital representation founded on open standards for interoperability.
The US National BIM Standard promotes the business requirement that this model be interoperable based on open standards.