The ICES-SI model provides a snapshot of sustainability for each year, generating economic, social and environmental variables. These are used to construct the sustainability indicators, according to the normalisation procedure described below.

Sustainability embodies many different components, which are typically characterised by diverse measurement units. To combine these different items into a single measure, it is necessary to reduce all indicators to a common scale.

FEEM SI indicators have been translated into a 0-1 scale using an indicator-specific normalisation grid (benchmarking) which is based on either relevant sustainability policy targets or an average-based criterion. The FEEM SI indicators are normalised according to a benchmarking function passing through five reference levels.

Each one of the five reference levels corresponds to a given level of sustainability, moving from extremely unsustainable (0) to fully sustainable (1). Here are the definitions of the five reference levels.


0 extremely unsustainable situation
0.25 indicator is still not sustainable but not as severely as in the previous case
0.50 a discrete level of sustainability, but still far from target
0.75 satisfactory level in the sustainability, yet not on target
1 target level, fully sustainable
Browse through FEEM SI publications to know more about the FEEM SI normalisation procedure or move on to the aggregation step