System Boundary Selection in Life-Cycle Inventories Using Hybrid Approaches

Sangwon Suh; Manfred Lenzen; Graham J.TreloarHiroki HondoArpad HorvathGjalt HuppesOlivier JollietUwe KlannWolfram KrewittYuichi MoriguchiJesper MunksgaardGregory Norris

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System Boundary Selection in Life-Cycle Inventories Using Hybrid Approaches

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Life-cycle assessment (LCA)is a method for evaluating the environmental impacts of products holistically,including direct and supply chain impacts.The current LCA methodologies and the standards by the International Organization for Standardization (ISO)impose practical difficulties for drawing system boundaries;decisions on inclusion or exclusion of processes in an analysis (the cutoff criteria)are typically not made on a scientific basis.In particular,the requirement of deciding which processes could be excluded from the inventory can be rather difficult to meet because many excluded processes have often never been assessed by the practitioner,and therefore,their negligibility cannot be guaranteed.LCA studies utilizing economic input-output analysis have shown that,in practice,excluded processes can contribute as much to the product system under study as included processes;thus,the subjective determination of the system boundary may lead to invalid results.System boundaries in LCA are discussed herein with particular attention to outlining hybrid approaches as methods for resolving the boundary selection problem in LCA.An input-output model can be used to describe at least a part of a product system,and an ISO-compatible system boundary selection procedure can be designed by applying hybrid input-output-assisted approaches.There are several hybrid input-outputa analysis-based LCA methods that can be implemented in practice for broadening system boundary and also for ISO compliance.

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《Environmental Science & Technology: ES&T》 |2004年第3期|657-664|共8页
作者
Sangwon Suh; Manfred Lenzen; Graham J.TreloarHiroki HondoArpad HorvathGjalt HuppesOlivier JollietUwe KlannWolfram KrewittYuichi MoriguchiJesper MunksgaardGregory Norris;
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作者单位

CML,Leiden University,P.O.Box,9518,2300RA,Leiden,The Netherlands,School of Physics,A28,The University of Sydney,New South Wales,2006,Australia,School of Architecture and Building,Waterfront Campus,Deakin University,Geelong Vic 3217,Australia,Socio-ec;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
原文格式 PDF
正文语种英语
中图分类环境化学;
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System Boundary Selection in Life-Cycle Inventories Using Hybrid Approaches

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