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Article: An Index of Completeness (IoC) of Life Cycle Assessment: Implementation in the Building Sector

TitleAn Index of Completeness (IoC) of Life Cycle Assessment: Implementation in the Building Sector
Authors
KeywordsLife cycle assessment
System boundary
Completeness
Building
Issue Date2021
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/jclepro
Citation
Journal of Cleaner Production, 2021, v. 283, p. article no. 124672 How to Cite?
AbstractOver the past three decades, life cycle assessment (LCA) has been increasingly employed to evaluate the environmental impacts of products and buildings. However, the reliability of LCA is frequently weakened by the practice of arbitrary omission of processes and materials and the problem of insufficient data, both leading to inconsistencies in the LCA results. This study proposes an Index of Completeness (IoC) to account for the completeness of an LCA study for a variety of impact categories. An IoC calculation tool is developed to cover the entire life cycle of buildings, including stages of product, construction, use and end-of-life as well as the benefits from recycling and reuse. The IoC helps to identify and remove the inconsistencies in LCA and to enhance its comparability. Residential building projects are tested as case studies. It is found that the IoCs of most impact categories are as high as 98%–99%, whereas of the category of human toxicity the IoC is 85%, mainly due to the fact that plywood formwork was not included in the original model. Sensitivity analysis reveals that dataset changes in an LCA model can not only affect the impact assessment results, but also possibly have influence on the completeness of the LCA model. The LCA practitioners are suggested to combine the newly developed IoCs with the standard four phases of LCA when applying to complex products. Future research should focus on case studies implementing the IoC calculation tool, inclusion of more impact categories in the IoC model, and continuing development to include other complex products.
Persistent Identifierhttp://hdl.handle.net/10722/290871
ISSN
2019 Impact Factor: 7.246
2015 SCImago Journal Rankings: 1.721
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorDong, Y-
dc.contributor.authorLiu, P-
dc.contributor.authorHossain, MU-
dc.contributor.authorFang, Y-
dc.contributor.authorHe, Y-
dc.contributor.authorLi, H-
dc.date.accessioned2020-11-02T05:48:18Z-
dc.date.available2020-11-02T05:48:18Z-
dc.date.issued2021-
dc.identifier.citationJournal of Cleaner Production, 2021, v. 283, p. article no. 124672-
dc.identifier.issn0959-6526-
dc.identifier.urihttp://hdl.handle.net/10722/290871-
dc.description.abstractOver the past three decades, life cycle assessment (LCA) has been increasingly employed to evaluate the environmental impacts of products and buildings. However, the reliability of LCA is frequently weakened by the practice of arbitrary omission of processes and materials and the problem of insufficient data, both leading to inconsistencies in the LCA results. This study proposes an Index of Completeness (IoC) to account for the completeness of an LCA study for a variety of impact categories. An IoC calculation tool is developed to cover the entire life cycle of buildings, including stages of product, construction, use and end-of-life as well as the benefits from recycling and reuse. The IoC helps to identify and remove the inconsistencies in LCA and to enhance its comparability. Residential building projects are tested as case studies. It is found that the IoCs of most impact categories are as high as 98%–99%, whereas of the category of human toxicity the IoC is 85%, mainly due to the fact that plywood formwork was not included in the original model. Sensitivity analysis reveals that dataset changes in an LCA model can not only affect the impact assessment results, but also possibly have influence on the completeness of the LCA model. The LCA practitioners are suggested to combine the newly developed IoCs with the standard four phases of LCA when applying to complex products. Future research should focus on case studies implementing the IoC calculation tool, inclusion of more impact categories in the IoC model, and continuing development to include other complex products.-
dc.languageeng-
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/jclepro-
dc.relation.ispartofJournal of Cleaner Production-
dc.subjectLife cycle assessment-
dc.subjectSystem boundary-
dc.subjectCompleteness-
dc.subjectBuilding-
dc.titleAn Index of Completeness (IoC) of Life Cycle Assessment: Implementation in the Building Sector-
dc.typeArticle-
dc.identifier.emailHossain, MU: uzzal@hku.hk-
dc.identifier.authorityHossain, MU=rp02580-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.jclepro.2020.124672-
dc.identifier.scopuseid_2-s2.0-85094098404-
dc.identifier.hkuros317993-
dc.identifier.volume283-
dc.identifier.spagearticle no. 124672-
dc.identifier.epagearticle no. 124672-
dc.identifier.isiWOS:000608120300010-
dc.publisher.placeNetherlands-
dc.identifier.issnl0959-6526-

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