ABSTRACT
Reliability of a system is the probability of a system performing its required function adequately for specified period of time under stated conditions. Computing the probability of failure scenario around an unknown value is the most vital part of reliability analyses. The variables in a reliability study depend on the nature of the problem posed, but have high interaction between the various specialties that collectively provide additional information to the decision maker. There are different levels of reliability analysis, which can be used in any design methodology depending on the importance of the structure. Reliability analysis of offshore structures could be formulated in different ways: time-invariant problems and time-variant problems. In order to compute system reliability, one must be able to compute the probability of a union of events or the probability of an intersection of events.
