Normalisation and weighting in life cycle assessment: Quo Vadis?

Purpose The paper provides an overview of normalisation and weighting approaches within life cycle assessment and aims at identifying purposes, current practices, pros and cons, as well as research gaps in normalisation and weighting. Based on this information, the paper wants to provide guidance to developers and practitioners. The underlying work was conducted under the umbrella of the UNEP-SETAC Life Cycle Initiative, Task Force on Cross-Cutting issues in LCIA. Methods The empirical work consisted in: (i) an online survey to investigate the perception of the LCA community regarding the scientific quality and current practice concerning normalisation and weighting; (ii) a classification followed by systematic expert-based assessment of existing methods for normalisation and weighting according to a set of five criteria: scientific robustness, documentation, coverage, uncertainty, complexity. Results and discussion The survey results showed that normalised results and weighting scores are perceived as relevant for decision-making, but further development is needed to improve uncertainty and robustness. The classification and systematic assessment of methods allowed for the identification of specific advantages and limitations. Conclusions Based on the results, recommendations are provided to practitioners that desire to apply normalisation and weighting as well as to developers of the underlying methods.

PIZZOLO Massimo;  LAURENT Alexis;  SALA Serenella;  WEIDEMA B.;  VERONES Francesca;  KOFFLER Christoph; 

2017-05-19

SPRINGER HEIDELBERG

JRC101299

0948-3349,   

http://link.springer.com/article/10.1007/s11367-016-1199-1,    https://publications.jrc.ec.europa.eu/repository/handle/JRC101299,   

10.1007/s11367-016-1199-1,