Policy     Economics     Technologies

On weighting - A review of LCA weighting methods

Product life cycle assessment (LCA) is an attractive tool for making environmentally-informed choices from among product alternatives. The results of an LCA – the product’s ‘environmental profile’ - is essentially a list of the product’s direct or indirect contributions to various kinds of environmental impact, such as climate change, acidification, eutrophication, toxicity, land use and resource depletion. Before a choice can ultimately be made, it is important that the various environmental impacts are made mutually comparable, enabling the impact scores for each product alternative to be translated into a one-figure final score. For this ‘weighting’ step in LCA a variety of methods have been developed. It is a controversial issue, though, because in this kind of procedure value judgments are by definition inescapable. This report discusses the main LCA weighting methods available and the pros and cons of weighting in the LCA context.

Authors CE

Marijn Bijleveld

Delft, April 2010

report (only available in Dutch)

Tweets by @cedelft

Waarom kiezen voor de planeconomie? Column Frans Rooijers over Klimaat- en Energieakkoord #energieakkoord op Energi… https://t.co/S4PPQTlB8z
13-12-2017 09:55

Article - Evaluating the environmental impact of debit card payments https://t.co/IfnNwC3p0b
07-12-2017 16:23

Rapport Net voor de Toekomst - scenario's voor investeringskeuzes van netbeheerders in infrastructuren https://t.co/W4mUsLCuZ0
07-12-2017 16:04

Gezamenlijke visie om Omgevingswet, regionale energiestrategie en warmtetransitieplan lokaal gelijk te gebruiken… https://t.co/YwHhzl338d
06-12-2017 16:30

Position paper @CEDelft t.b.v. hoorzitting/rondetafelgesprek Kunststofketen en zwerfafval Tweede Kamer d.d. 30 nove… https://t.co/fLEooSyZL6
30-11-2017 12:32