ABSTRACT
The long lasting experience gained in the application of quantitative risk analysis for Italian railway tunnels and semi-quantitative methods, employed for several complex projects abroad in the last decade, has provided a wide risk ranking framework and feedback about design choices. The integration between these methods and outcomes allowed widening the field of analysis, framing the tunnels within a wider infrastructure context and in all life cycle stages, identifying all key-players in each phase, with roles and responsibilities. The integrated approach, based on the operations risks forecasting in the design stage ensures the continuous improvement of project processes, by managing all related risk preventing overhaul and changes (increased times and costs) and, eventually, infrastructure management issues in the construction/operation phases. As an example, a case study related to project risk management for a long tunnel is reported.
