This method handbook tries to provide such a compromise: it gives guidance for diverse projects of the programme 'Biomass energy use' and as such improves the connectivity of the evaluation fi ndings. The suggested method documentations are based on the current state of scientifi c knowledge and range from qualitative descriptions of methods to detailed calculation methods. They are limited to selected questions and provide no complete evaluation of sustainability. It is the result of a four-year discussion process, enriched by the project partners of the funding programme. Valuable contribution were generated in working groups and at various workshops. Here the dedication of the working groups 'Biomass Potentials', 'Life-cycle Assessment', 'Thermochemical Gasifi cation' and 'Reference Systems' should be particularly mentioned. This version of the method handbook is now established and through its coordinated reference systems it forms a bridge for the overall classifi cation of the research projects and the funding programme in the framework of the German climate protection discourse. Without doubt, the approaches and calculation procedures listed here only represent a starting point; on which further developments can be based upon, both scientifi cally and in practical applications. Future constructive and fruitful collaborations within the programme are essential for this and other challenges surrounding the harmonisation of methods. All this is still driven by the need and the goal to further optimise, little by little, the use of biomass in energy production.