. UNCERTAINTY AND IMPRECISION IN SAFETY ASSESSMENT OF OFFSHORE STRUCTURES ZHANG MINGQIANG NAT I O NA L UNIV ER SIT Y OF SINGAPORE 2012 UNCERTAINTY AND IMPRECISION IN SAFETY ASSESSMENT OF OFFSHORE. realistic modeling and an adequate processing of t h e avail- able information regarding marine corrosion and marine growth effects through the safety assessment of offshore structures. In view of a n. Tables xv List of Figures xvii List of Symbols xxi 1 Introduction 1 1.1 Uncertainty and Imprecision . . . . . . . . . . . . . . . . . . . . . . 4 1.2 Modeling of Uncertainty and Imprecision .