Case Studies on LCA Practices for Buildings “Utilization of Environmental Declaration and Multi-criteria Assessment Using an LCA Support System”

Abstract

This paper reports on LCA practices for buildings, including the utilization of environmental labeling systems, the efficiency improvement of LCA calculation through an LCA support system, and the implementation of multi-criteria assessment. First, case studies are presented in which LCA has been conducted based on cost estimation data of buildings and the evaluation results have been disclosed using environmental labeling systems. Next, the calculation techniques necessary for effective LCA implementation and the challenges to be addressed are explained, followed by a report on the overview of a supervised learning-based LCA support system developed as a solution to these challenges. This system achieves semi-automation of detailed LCA calculation at a level capable of obtaining environmental labels from construction cost estimates, significantly reducing the required working period. Finally, practical examples of multi-criteria assessment of buildings using this system are introduced.