The last decades have witnessed the development of methods for solving struc- tural reliability problems, which emerged from the efforts of numerous re- searchers all over the world. For the specific and most common problem of determining the probability of failure of a structural system in which the limit state function g( x) = 0 is only implicitly known, the proposed methods can be grouped into two main categories: - Methods based on the Taylor expansion of the performance function g(x) about the most likely failure point (the design point), which is determined in the solution process....