For energy supply the building has a photovoltaic system producing more than 200 MWh per year via a gross area of circa 1,500 m² of tempered glass located on the roof. The sharing of information during the design process, the adherence to the dynamic requirements of the architects and the clients and the organisation of the international closed loop of brief-design-application- permit-implementation required enormous personal and technological commitment. The tender-award-contract-settlement process may have proceeded in a largely traditional manner but not without a number of individual and pragmatic steps resulting from the special needs of the project and its participants.