Our Working Groups

Technical Working Group (TEWOG)


ECO Platform's Technical Working Group (TEWOG) is the core of deep knowledge, consisting of LCA and EPD experts, joined by many stakeholders around the central issues.

It is the privilege of all ECO Platform members to have free access to the TEWOG. Interested members can contact our convenor Eva Schmincke for detailed information, how to participate or be included in the information flow.

The tasks of our TEWOG are widespread

  • maintenance of our common audit and verification guidelines
  • development of common rules for EPD tool verification
  • discussion of technical problems
  • preparation of position papers on technical issues
  • provision of technical advice to members / the BoD / relevant Stakeholders
  • (mediation in case of disputes)

Some relevant issues of our TEWOG under current development:
(For more information please click on the following tabs)

Implementation of EN15804+A2

By end of 2019 the EN 15804+A2, the amended standard was published. The aim of the amendment is a better match between EPD and PEF (product environmental footprint). EPD is the information transfer tool of product information for sustainable building. PEF is meant to educate consumers about the environmental performance of products – also consumer products in the construction sector. PEF simplifies the information for consumers by weighting and aggregation whereas EPD provides unaggregated information for professional users. With the amendment EPD will show circularity of products by calculating the end-of-life.  They declare the same indicators as PEF, have the same ILCD format for inventory data and have become more detailed on describing use, emission and content of biogenic carbon. The new rules in EN 15804+A2 are applicable in parallel with EN 15804+A1, by end of 2022 the A1-Version will be removed. The A2-Version requires an adaptation of the verification checklist which has been completed recently by the TEWOG.

EPD Tool verification

Recently the application of pre-defined LCA models have cut the costs for calculation and verification of EPD significantly. Among others, associations, manufacturers with large product portfolios or monitoring their environmental performance over time make use of such tools. EPD produced by the tool can be product specific based on defined input-parameters, while the calculation model is fixed. Once a tool has passed verification, EPD can be verified with less effort because the environmental performance declared in the EPD is also pre-defined according to the conditions of the tool. It is however important that the tool is checked rigorously. Our TEWOG has completed verification rules for LCA tools and EPD tools. As the market for such tools is growing quickly this has become an on-going task!

Green electricity

TEWOG has followed the development of the European commission in facilitating use of green electricity data and avoiding green washing by double counting. The European requirement to use registered GoO (Guarantee of Origin) has simplified the application. However, the open market for electricity products, the growing need to reduce the CO2 burdens, the limitations in interconnection of grids and the uneven distribution of green power in the member states pose problems in detail which we are tackling one by and one. The ISO standard for carbon footprint provides guidance which TEWOG translates into data quality requirements that can be checked during verification. The task is still ongoing.

Electric and electronic technical Equipment

The PEP Ecopassport program has become a member of the ECO platform. Ecopassport documents are partly based on EN 15804 and also fulfil requirements specific for electric and electronic products for those EE-products that are also being applied in construction like elevators, pumps, cables, batteries etc. With smart buildings, energy de-centralisation and the availability of green power these products are becoming very relevant. TEWOG investigates how we can apply at building level both EPD and Ecopassorts for improving building performance.


Digitalisation of EPD is an ongoing task. The TEWOG works together with the InData project. The InData project has developed a format for EPD data that is compliant with ILCD and all InData members have committed to use this format. TEWOG’s task is to support InData with technical advice.

Dr. Eva Schmincke
Dr. Eva Schmincke