66-ME4211 - the same unit, and they can therefore be added....

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2. Normalisation and Weighting In normalisation , the product’s impact potentials and resource consumptions are set in relation to a common reference impact to enable an assessment of which potentials are large and which small , and thus to facilitate subsequent weighting. In weighting , the normalised impact potentials and resource consumptions are multiplied by a weighting factor which , within each of the main groups environment, resources and working environment, expresses the seriousness of the individual impact categories or resource consumptions relative to one another. 1
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2.1 Normalisation (i) Carry out normalisation by dividing the product’s impact potentials or resource consumptions by the corresponding normalisation references from Tables 4.10a and 4.10b. (ii) Then aggregate the normalised potentials for ecotoxicity and human 2
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In normalisation, all potential impacts gain
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Unformatted text preview: the same unit, and they can therefore be added. This enables a reduction in the number of ecotoxicity and human toxicity categories. Before normalization there are up to four potentials for ecotoxicity and four for human toxicity. The two general impact categories ecotoxicity and human toxicity are thus represented by more impact potentials than all of the other types of environmental impacts in the products environmental 5 The above three toxicity potentials provide a better basis for the weighting of the environmental impact categories relative to one another . Impact potentials and resource consumptions are calculated for the product's average annual environmental exchanges, and on normalization they are therefore expressed in person equivalents, PEWDK90 fractions of the community's 6...
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66-ME4211 - the same unit, and they can therefore be added....

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