This study aims to set a framework for a prenormative research programme in support of a sound, scientifically founded classification system for reaction to fire, based on characteristic material parameters which have a physical meaning and which can be used in fire safety engineering methods. In this study the proposed reference situations are reviewed and related to hazards. Subsequently the major fire phenomena are identified, and their relevance for each fire scenario is discussed. A review of available large scale test data is given with respect to each scenario, the available measurements and data. National test methods currently used in the EU countries are discussed and assessed with respect to the relevance of their data. ISO test methods are also discussed. The study concludes with a recommendation for a future research programme to develop a classification scheme for the reaction to fire behaviour of construction products subjected to different fire scenarios.