![]() In order to do this it must be possible to monitor the varying energy consumptions of each product e.g.A more representative approach is to assign a weighting to each output relative to the amount of energy it takes to produce.It would not be representative to simply add the various quantities of Products A, B and C due to their different energy intensities.Must be a measure which can be meaningfully compared year-on-yearĮnergy per unit output If tonnes is used as output measure:.It is necessary to look at the relative energy intensity of each product and assign a weighting if appropriate.However, most firms have more than one product therefore an aggregate output must be selected.For a single commodity manufacturer, the output unit is simply their base production unit. ![]() Subsequent improvements or deteriorations in energy performance are reflected in a decrease or increase of EPI.For a member’s first year of joining the LIEN, their EPI is normalised to 100.This output is developed individually by each company to reflect their unique mix of products and processes.A company’s Energy Performance Index (EPI) is based on the ratio of annual primary energy consumption to aggregate product output.
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