Building Environmental Life Cycle Assessment Based On Evidential Reasoning Approach And Group Decision Making

Building environmental life cycle assessment is affected by a number of uncertainties. In this paper, environmental impact assessment indicators are established based on the natural resources consumed and the impact on the environment in various stages of life cycle of a building product. For the uncertainty and ambiguity of indicators for measurement, the merits that evidential reasoning approach can deal with the qualitative indicators better are used to study the building environmental life cycle assessment based on evidential reasoning approach and group decision making. For the weight of experts in group decision making, this important influencing factors, the multi-objective decision- making method that measures the experts'weight by the level of experts'knowledge is studied. By analyzing the environmental impact of the buildings in various stages of their life cycle, a comprehensive evaluation index system consisting of a set of four one-level indicators and eighteen two-level indicators is constructed. The group decision-making method to determine the index weight is used. At the same time, the sensitivity analysis that the change of the experts'weight is based on the weights of the building environmental life cycle evaluation indicators is done. The evaluation methodology system based on evidential reasoning approach is established. The selection of four buildings in a university campus is used for a case, with different risk types of utility function to reflect the preferences of the different stakeholders, environmental impact brought by each building is evaluated respectively from the public, designers and owners, developers and contractors, and the final choice is given. It facilitates the resolution of environmental issues in building life cycle.