Chain-of Events Model Explains accidents in terms of multiple events, sequenced as a forward chain over time. Simple,direct relationship between events in chain Ignores non-linear relationships,feedback,etc. Events almost always involve component failure, human error,or energy-related event Therefore,preventing the lowest level event became the focus of system engineering,which is dominated by reliability engineering. System Engineering by J.J.Gao CLGO 13+ - System Engineering by J. J. Gao 13 Chain-of Events Model