Chapter Risk And Risk Perception For Low Probability, High – Consequence Events In The Built Environment – Ross B Corotis – Why Risk? – Structural Reliability – Mathematical Basis – Mathematical Reliability Versus Codified Design – Risk And Risk Perception – Low Probabilities And High Consequences – Issues With Events Of Small Probability – Issues With The Convolution Of Probability And Consequence – Issues Of Political Accountability – Alternative Decision Criteria – Expected Value – Minimum Regret – Minimax And As Low As Reasonable – Additional Criteria – Societal Decisionmaking – Tradeoffs – Development, Sustainability And Intergenerational Issues – Assessing Risks And Benefits – Economic Lifetime – Utility And Discounting – Probabilistic Risk Versus Uncertainty – Objective And Subjective Probability – Aleatoric And Epistemic Uncertainty – Psychological Distinctions – Risk Or Risk Perception? – Political Issues – References – Chapter Socioeconomic Risk Acceptability Criteria – R¨Udiger Rackwitz – Introduction – Theoretical Developments – Swtp’s For Some Selected Countries – Application To Eventtype Hazards From Technical Facilities And – The Natural Environment – Summary And Conclusions – References – Chapter Reliability In Structural Performance Evaluation And Design .