ABSTRACT
ABSTRACT To increase the sustainability of buildings already in early design phases, Life Cycle Assessment (LCA) should be integrated into Building Information Modelling (BIM). However, LCA and thus the calculation of embedded energy and greenhouse gases in early design phases can only be performed with a certain level of inaccuracy/uncertainty. This is caused by a lack of information in 3D building models in BIM. To close this gap, the needed information is estimated, which can only happen within a certain range of fuzziness. In this study, the impact of adding estimated information, including fuzziness, to the calculation of the embedded greenhouse gases (EGHG) is analysed for a specific case study. The main result of the study is that in early design phases important information for the EGHG calculation is missing which can have a high impact on the results and can therefore affect the design of buildings in early design phases.
