Attributional and consequential LCA in the ILCD handbook
This discussion article aims to highlight two problematic aspects in the International Reference Life Cycle Data System (ILCD) Handbook: its guidance to the choice between attributional and consequential modeling and to the choice between average and marginal data as input to the life cycle inventory (LCI) analysis.
We analyze the ILCD guidance by comparing different statements in the handbook with each other and with previous research in this area.
Results and discussion
We find that the ILCD handbook is internally inconsistent when it comes to recommendations on how to choose between attributional and consequential modeling. We also find that the handbook is inconsistent with much of previous research in this matter, and also in the recommendations on how to choose between average and marginal data in the LCI.
Because of the inconsistencies in the ILCD handbook, we recommend that the handbook be revised.
KeywordsAttributional LCA Average data Consequential LCA ILCD handbook Life cycle inventory analysis Marginal data Review
- Ekvall T (1999) System expansion and allocation in life cycle assessment—with implications for wastepaper management. PhD thesis. Dept. Technical Environmental Planning, Chalmers University of Technology, Gothenburg, SwedenGoogle Scholar
- European Commission (2013a) Building the single market for green products. Facilitating better information on the environmental performance of products and organisations. COM(2013) 196 final, Brussels, 9.4.2013Google Scholar
- European Commission (2013b) Commission Recommendation of 9 April 2013 on the use of common methods to measure and communicate the life cycle environmental performance of products and organisations. 2013/179/EUGoogle Scholar
- European Commission (2015a) EEB-01-2016: Highly efficient insulation materials with improved properties. In: Horizon 2020 Work Programme 2016–2017: 5.ii. Nanotechnologies, Advanced Materials, Biotechnology and Advanced Manufacturing and Processing. European Commission Decision C (2015)6776 of 13 October 2015Google Scholar
- European Commission (2015b) NMBP-06-2017: Improved material durability in buildings and infrastructures, including offshore. In: Horizon 2020 Work Programme 2016–2017: 5.ii. Nanotechnologies, Advanced Materials, Biotechnology and Advanced Manufacturing and Processing. European Commission Decision C (2015)6776 of 13 October 2015Google Scholar
- JRC-IEA (2010) International Reference Life Cycle Data System (ILCD) Handbook—General guide for Life Cycle Assessment—Detailed guidance. First edition March 2010. Publications Office of the European Union, Luxembourg. Available at http://lct.jrc.ec.europa.eu/
- Sonnemann G, Vigon B (2011) Global guidance principles for life cycle assessment databases. UNEP/SETAC Life Cycle Initiative, Paris/PensacolaGoogle Scholar
- Weidema BP, Frees N, Nielsen A-M (1999) Marginal production technologies for life cycle inventories. Int J Life Cycle Assess 4:448–456Google Scholar