Fig. 2. Comparison of the contents of BREEAM, LEED and DGNB In general, the assessment methods can be assigned to two categories, distinguishing assessment typologies of the first and second generation. The assessment methods of the first generation include those tools which were the first systems to be developed in the 1990s, attributing priority to evaluating the "green" or environmental and energy-efficient building performance criteria (like BREEAM, LEED or CASBEE), i.e. featuring the Greenbuilding approach. Second-generation assessment methods, like DGNB, include those tools which do not only consider environmental building criteria but the overall performance of the entire construction, namely also economic, socio-cultural and technical aspects or aspects related to site and process quality (Sustainable-building approach) (see figure 2).
4. Olympic Venues and Assessment Methods Existing assessment methods, like LEED, BREEAM or DGNB are however predominantly designed for the assessment of the planning, construction and the management of office, residential and industrial buildings. In the field of sports facilities such tools haven’t been yet established in the international building sector. If we want to know, how such assessment methods are working for sport facilities, we have to look on Olympic Games. To implement a sustainable planning process for Olympic Games, the IOC demands in its Candidature Procedure and Questionnaire that an environmental impact assessment for all