The guideline series VDI 3814 describes requirements for plants, software and services as well as descriptions for duties to the automatic control and regulation, supervision, optimisation and service as well as the management of the technical building services. The guideline treats the integration of different systems and devices of the building services and indicates to explain how the duties and conditions are to be reached around the desired whole functionality. Tables offer some help to do the planning of the integration level between the plants, the tables are organised along DIN 276.