The level of failure costs in Building and Construction is still at a high level. A major cause of failure costs is the use non valid or wrong documents / models in the process. The release process is about controlling the quality of documents / models in a structured way. The major three attributes of a document / model to manage it are its identity, its version and the (maturity) status of this version. In Building and Construction processes the status of a document / model is hardly used. The article proposes a release process in the environment of an extended enterprise based on the natural principals of releasing information. This basic release process will be extended to implement concurrent engineering, the aspect of mutual involvement, in a structural way in the release process.