Of the selected subcategories, local experts believed that health and safety (worker) is the most important social aspect. In stage three, a case study following the four-phase structure of S-LCA suggested by the UNEP/SETAC guidelines is conducted. Based on that, the SMoC model which consists of a set of functional worksheets is built. In stage two, a questionnaire survey is conducted to collect the weighting factors and to unveil the social impacts of on-site construction practices. Stage one strives to establish the sLCIA method which includes the characterization, normalization and weighting. The development of SMoC is composed of three stages. In this paper, a social life cycle impact assessment (sLCIA) method is developed and a case study of a building construction project in Hong Kong is performed. This study aims to develop a S-LCA model for building construction projects in Hong Kong, namely, the Social-impact Model of Construction (SMoC). To further improve the reliability of S-LCA, more case studies and methodologies are of paramount importance. Social life cycle assessment (S-LCA) is a relatively new technique that is under rapid development.
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