Normalization in sustainability assessment: Methods and implications

One approach to assessing progress towards sustainability makes use of multiple indicators spanning the environmental, social, and economic dimensions of the system being studied. Diverse indicators have different units of measurement, and normalization is the procedure employed to transform differing indicator measures onto similar scales or to unit-free measures. Given the inherent complexity entailed in interpreting information related to multiple indicators, normalization and aggregation of sustainability indicators are common steps after indicator measures are quantified. However, it is often difficult for stakeholders to make clear connections between specific indicator measurements and resulting aggregate scores of sustainability. Motivated by challenges and examples in sustainability assessment, this paper explores various normalization schemes including ratio normalization, target normalization, Z-score normalization, and unit equivalence normalization. Methods for analyzing the impacts of normalization choice on aggregate scores are presented. Techniques are derived for general application in studying composite indicators, and advantages and drawbacks associated with different normalization schemes are discussed within the context of sustainability assessment. Theoretical results are clarified through a case study using data from indicators of progress towards bioenergy sustainability.

[1]  J. Stiglitz,et al.  The measurement of economic performance and social progress revisited , 2009 .

[2]  B. Moldan,et al.  How to understand and measure environmental sustainability: Indicators and targets , 2012 .

[3]  S S Stevens,et al.  On the Theory of Scales of Measurement. , 1946, Science.

[4]  Ana Rita Domingues,et al.  On multi-criteria sustainability assessment: Spider-gram surface and dependence biases , 2014 .

[5]  Reinout Heijungs,et al.  Bias in normalization: Causes, consequences, detection and remedies , 2007 .

[6]  R. Luce,et al.  On the possible psychophysical laws. , 1959, Psychological review.

[7]  K. Mori,et al.  Review of sustainability indices and indicators: Towards a new City Sustainability Index (CSI) , 2012 .

[8]  Saurabh Gupta,et al.  An overview of sustainability assessment methodologies , 2009 .

[9]  H. Welsch,et al.  Meaningful environmental indices: a social choice approach , 2004 .

[10]  Shabbir H. Gheewala,et al.  Sustainability Assessment Methodology of Biomass Utilization for Energy in East Asian Countries , 2012 .

[11]  V. Dale,et al.  Indicators for assessing socioeconomic sustainability of bioenergy systems: A short list of practical measures , 2013 .

[12]  Michael Freudenberg,et al.  Composite Indicators of Country Performance: A Critical Assessment , 2003 .

[13]  A. Scolobig,et al.  Choosing the most appropriate sustainability assessment tool , 2012 .

[14]  Nathan Pollesch,et al.  Applications of aggregation theory to sustainability assessment , 2015 .

[15]  Caterina Cruciani,et al.  Constructing the FEEM Sustainability Index: A Choquet-Integral Application , 2012 .

[16]  Luca Bechini,et al.  Integrated sustainability assessment of cropping systems with agro-ecological and economic indicators in northern Italy , 2010 .

[17]  Peter Reichert,et al.  The method matters: a guide for indicator aggregation in ecological assessments , 2014 .

[18]  B. W. Ang,et al.  Comparing aggregating methods for constructing the composite environmental index: An objective measure , 2006 .

[19]  Howard T. Odum,et al.  Emergy evaluation of reforestation alternatives in Puerto Rico , 2000 .

[20]  Fred S. Roberts,et al.  Meaningful and Meaningless Statements in Landscape Ecology and Environmental Sustainability , 2014 .

[21]  Alexandru Maxim.  Sustainability assessment of electricity generation technologies using weighted multi-criteria decision analysis , 2014 .

[22]  Esther S. Parish,et al.  Assessing multimetric aspects of sustainability: Application to a bioenergy crop production system in East Tennessee , 2016 .

[23]  Audrey L Mayer,et al.  Strengths and weaknesses of common sustainability indices for multidimensional systems. , 2008, Environment international.

[24]  Esther S. Parish,et al.  Indicators to support environmental sustainability of bioenergy systems , 2011 .

[25]  Peter Glavič,et al.  A model for integrated assessment of sustainable development , 2005 .

[26]  Thomas Gloria,et al.  Development of the method and U.S. normalization database for Life Cycle Impact Assessment and sustainability metrics. , 2006, Environmental science & technology.

[27]  S. Kuester.  The Nature and Properties of Soils , 1953, Soil Science Society of America Journal.

[28]  Stefano Tarantola,et al.  Handbook on Constructing Composite Indicators: Methodology and User Guide , 2005 .

[29]  Ekko C. van Ierland,et al.  A holistic sustainability assessment tool for bioenergy using the Global Bioenergy Partnership (GBEP) sustainability indicators , 2014 .

[30]  TillerKelly.  Tennessee case study in full-scale development and integration of switchgrass feedstocks with biorefinery operations: Genera Energy and UT Biofuels Initiative , 2011 .

[31]  Christoph Böhringer,et al.  Measuring the Immeasurable: A Survey of Sustainability Indices , 2007 .