DGNB (Deutsche Gesellschaft für Nachaltiges Bauen or German Sustainable Building Council) was founded in 2008 and focuses on around 50 criteria ranging from environmental, economic, technological and work process aspects to sociocultural and functional dimensions. Acoustic comfort is also considered. “A holistic approach is taken” meaning the system assesses the entire lifecycle of the building. Buildings are awarded DGNB certificates in bronze, silver or gold. In addition, there is the option of simple precertification in the planning phase.