The letters “BIM " are used in practice in three interrelated meanings. The first meaning is “Building Information Model", a digital representation of how a building is designed, realized and/or actually built. In the second sense, "Building Information Modeling", the emphasis is more on the process of collaborating on a digital building model. Related concepts are integral design, competitor engineering, lean planning and digital information sharing. In the third sense, "Building Information Management", the information itself is central: the management and (re)use of digital building information throughout the entire life cycle of the building. Source: