According to sustainability research the world has exceeded four out of seven planetary boundaries. The areas of climate change, biodiversity loss, nitrogen cycle and land use have left the so called safe operating space for humanity. The built environment is one of the major contributors to environmental impacts. Especially the embodied energy during the construction phase of the built environment and the energy demands during the use of buildings contribute to a high energy and resource consumption. In the year 2015 the United Nations adopted the Sustainable Development Goals (SDGs), a universal development agenda, which goals need to be fulfilled by the year 2030 and by all UN countries worldwide. Amongst other countries Austria has adopted the 2030 agenda and has committed itself to the SDGs. Research objective was to explore the application of systemic approaches in the field of SDGs. The work presents a systematic literature review (SLR) and discusses an application of a qualitative system analysis (carried out with the tool iMODELER) on the SDGs. Results show how interdependencies among SDGs and among chosen concrete actions, e.g. for the built environment, can be visualized for a better systemic understanding. By visualizing synergies and trade-offs, effects of decisions taken can be estimated from a holistic perspective.

The construction industry adds a high share to global CO₂ emissions and, thus, to the global climate crisis. Future buildings need to be planned, constructed, operated, and deconstructed in a lifecycle-oriented manner so that the building stock represents a capital asset for future generations. The greatest leverages for reducing a building’s CO₂ emissions lie in the early project phase and subsequently in the tendering and awarding process, which makes early Life Cycle Assessment (LCA) indispensable. In this study, we set a sociological research framework consisting of (i) choosing a research topic, (ii) conducting a literature review, (iii) measuring variables and gathering data, (iv) analyzing data, and (v) drawing a conclusion. Since there are countless studies that apply LCA in the construction sector for environmental assessment, emission reduction, or decision support, we posed the question of whether LCA was also applied in the public building tendering and awarding process. Furthermore, we focused on identifying obstacles to LCA implementation in this early project phase. Therefore, we applied the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines and conducted a Systematic Literature Review (SLR). The results show that numerous articles focused on sustainable tendering or green public procurement in the construction industry; however, the LCA method is scarcely used in the procurement processes (19 articles in the final sample). Based on our findings, the main obstacles to LCA implementation in the procurement process are highlighted in the study. In the future, the mandatory integration of LCA into the procurement process will be crucial to reduce the CO₂ emissions generated by the construction industry and thus contribute to the EU climate target plan to ensure carbon neutrality by 2050.