Furthermore, the processing and evaluation of past events makes it possible to carry out simulations for the future at initially defined different risk levels. Another advantage is that the model is not a product of an engineering approach, it contains a priori no initial considerations, preconceptions or pre-defmed probabilities. The model is constructed flexibly, based on the information on the relationship between the most influential factors captured throughout the data collection process. Furthermore, there is a need for extensive data collection making comparisons between countries difficult.