IREES was responsible for organising the results in a simulation model. In this step, the statistical and analytical data were compiled in a simulation model for Luxembourg. Among other things, a simple model for energy demand was created for the purpose of developing a reference scenario (which is also to be referred to for the development of the energy strategy); the focus was not on energy supply. The modelling was carried out with the aid of the LEAP simulation model, which is distributed by Stockholm Environment Institute Boston.

The modelling was to have two functions:

• Integration of the statistical/analytical data and investigations in a harmonised framework that makes the continuation of the investigation easier at a later stage.
• The calculations of possible scenarios for the development of the energy strategy in Part 1 of the study, even if it was based strongly on qualitative arguments. The creation of scenarios was to be for the period up to 2020 or, based on simplified assumptions, up to 2030, and the results were to be compared with the projected developments from the EU PRIMES model. However, the results from that model should not be adopted uncritically but adapted taking into consideration the discussions in Luxembourg within the scope of this project as well as the experiences with the future development of drivers of energy consumption, particularly in Germany.