The Workshop on Simulation for European Space Programmes (SESP) was organised for the first time in 1990 and has been since held on a bi-annual basis. The workshop is an opportunity to increase awareness of new simulation technology, and how it can be applied successfully to support the design and implementation of space projects in a cost effective manner. The workshop also allows ESA to gather inputs from the participants as to what should be the goals for R&D and to promote harmonisation in this rapidly evolving technology domain.