Use when you must run a forward event-tree analysis of the sequences from an initiating event: enumerate every binary branch path through an ordered list of mitigating functions, each with its success probability, roll up each end-state outcome frequency as the initiator frequency times the product of the branch probabilities along the path, rank the end-state paths by frequency, sum the frequency over the paths that reach the failure end state, and screen the ranked sequences against the ARP4761A-class per-flight-hour severity targets to flag the dominant sequences. Produces the full path enumeration with per-path probabilities and frequencies, the frequency-ranked end-s…