The Reliability Analysis study type is used to compute the probability that all QoIs satisfy the reliability conditions or any QoIs satisfy the reliability conditions using the EGRA method. The EGRA method is constructed upon an AGP surrogate model where the EFF is used as an estimation of where the AGP model should append the next adaptation point. The EFF is constructed to balance the exploitation of the AGP model and the exploration of the unobserved input parameter space. More details of EGRA can be found in Reliability Analysis — Efficient Global Reliability Analysis.