Another method: Event Tree Analysis (ETA)
It is an inductive failure analysis performed to determine the consequences of a single failure for the overall system risk or reliability. Event Tree Analysis uses similar logic and mathematics as Fault Tree Analysis, but the approach is different – FTA uses deductive approach (from a system failure to its causes), while ETA uses the inductive approach (from basic failure to its consequences).
An event tree itself is a visual representation of single failure sequences, its influence on other events and on the whole system.