This website describes "The Model of the Eco-costs / Value Ratio" (EVR), and provides data on eco-costs to enable "Fast Track" LCA calculations.

The primary purpose of this website is to provide students of the Delft University of Technology
(and other people who are interested in the subject of sustainablility) with:
- practical data to assess the eco-burden of their designs (assisting them with LCA calculations)
- explanation of a prevention based "single indicator" for LCA: the method of the eco-costs
- knowledge on the subject of "eco-efficiency", "E/E factors", and how to apply them to de-link economy and ecology
- concepts of business strategies and governmental policies with regard to sustainability, and decision support tools on these issues.

The EVR is an E/E indicator which can be applied in cases where a designer (architect, product engineer, marketing manager, etc.) is asked to design a product (a house, a road, an appliance, a service, etc.) within a given price (budget). The issue then is to create maximum value for the end-user at a minimum of eco-costs (environmental burden). The calculation model can not only be applied in the stage were the design is ready (the classic LCA approach), but can also be applied in the early design stages of a feasibility study (when data on costs and market values are estimated). Calculations in combination with LCC and WLC are possible as well.

The rather complex issue of "allocation" in Product-Service Systems and in the End of Life phase, has been resolved in a practical and consistent way (where the existing LCA methodology failed until now to provide sufficient practical answers). This makes the system suitable for Cradle to Cradle calculations.
Furthermore the model comprises a system for modelling the issue of land-use, to be able to facilitate decisions with regard to spatial planning.

The theoretical basis of the model has been published in the Int. J. of LCA and some subsequent publications in J. of Cleaner Production , J. of Sustainable Product Design and Int. J. of Ecodynamics. Text books are available for students (publisher: DAP, Delft, The Netherlands).

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To facilitate calculations, a set of data on the eco-costs is provided in the Excel files at this site (eco-costs for more than 8000 pure substances, materials, processes and services). These data are also available in databases for Simapro and CesEdupack.
The IDEMAT App for Materials Selection, available for IOS and Android, has been developed to facilitate designers and engineers with their choices on materials, see . This app can also be used as a help to find the approptiate data lines in the aforementioned Excel Files.
For a short instruction video 1 click here

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An extension of the Idemat App is the IdematLightLCA app which enables Full LCA calculations, and shows the advantage of the circular economy. See for a description of this app the corresponding information of this site.
For a short instruction video 2 click here






The relevance of all the abovementioned models, books, and tools in terms of sustainable business strategies (in the circular economy), as well as the relevance for designers and engineers, is explaind by Joost Vogtländer in the following interviews:
A. video 1 (english dubbing) on the eco-costs and sustainability in business (English). Dutch version
B. video 2 (english dubbing) on eco-efficient value creation in the circular economy (English). Dutch version