Complex and high hazard systems should be properly analyzed to prevent or reduce possible risks. There are tools as FTA, ETA, and FMEA you can use for analytical purposes.
An event tree analysis is a powerful analytical tool that allows you to analyze an event within a system with its possible consequences and probabilities of various outcomes.
FTA (Fault Tree Analysis) diagram is used to analyze and understand possible risks, especially in high-hazard industries. It is a top-down diagram that organized the events and lower-level events using Boolean logic operators.