The research project "BIM-based operation" contributes standardization and uniform understanding of the BIM process and the resulting changes in the construction and real estate sectors. The project develops an ideal-type target process chain, based on an actual process analysis, for using the BIM method in real estate operations. A standardized life-cycle process is intent to show required information for operation actives in concrete terms. Based on this, information and communication interfaces can be identified to analyze changing performance requirements of the parties involved, and open questions such as legal issues can be further elaborated or dealt with. Based on literature research and numerous expert interviews, it analyzes and determines how individual process steps are carried out and which parties need to deliver what kind of information to which participant at what time, to fulfill build owners' requirements to a successfully constructed and managed building. The focus is thus on the exchange of information between those involved in the operation phase. Existing standards are consciously integrated into the development. Companies, institutions, and other stakeholders are thus given an overview of the situation in relation to the important exchange of information. In particular, the real estate operating phase is attributed to a high optimization potential through digitization.