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In order to create a measurable environmental impact, the raw materials and building materials 'to be used' are converted by the KoBeKalk program into their effect on the environment, which is expressed in, among other things, CO2 equivalent and SO2 equivalent. These environmental effects in turn translate into shadow prices. The Environmental Cost Indicator (ECI) is the sum of these shadow prices. The higher the environmental cost indicator, the worse the material is for the environment.


Its main objective is to achieve significant environmental benefits in the design, execution and tendering of civil engineering works. This makes KoBeKalk very attractive for registrations based on the BPQR (best price-quality ratio) criteria. This allows clients to assess offerings quickly and uniformly for environmental costs. Potential contractors and third parties can compare the environmental costs of different design and implementation variants and possibly increase their tenders.