BIM Building Information Model or Modelling connects many different information systems from various actors during the building construction process with each other in one easily accessible and understandable model. BIM assures an effective and efficient building construction process by reducing failing cost and reduces the use of materials by so called clash-controls. More and more buildings and infrastructural works are completed with help of BIM and materials, energy, time and money are saved by doing so. But why not use BIM for the exploitation phase of both new and existing buildings? By connecting the BIM model with the other exploitation information systems as Facility Management Information Systems (FMIS), and Building Information Systems it’s possible to create an easily accessible and understandable building and operating information management tool. Furthermore using BIM during the exploitation will increase the BIM market. This paper makes clear that BIM an make a big difference in the quality of the exploitation and operation of buildings, by helping creating a better and comfortable indoor climate while reducing energy losses and costs. Facility Managers should be the owners of this “exploitation and operation BIM” and have to know which information they must extract from the BIM and how to manage this information system. Another benefit will be time savings, and thereby money savings, because searching, reconstruction and updating building information again and again is not needed anymore. The paper also discuss some of the problems with the implementation and use of such a BIM.@en