[it is] impossible for [complex systems] to run without multiple flaws being present. Because these are individually insufficient to cause failure they are regarded as minor factors during operations … complex systems run as broken systems.
Organizations are ambiguous … [and that] ambiguity is resolved by actions of practitioners at the sharp end of the system.
Safety is an emergent property of systems … continuous systemic change insures that hazard and its management are constantly changing.
… all practitioner actions are actually gambles, that is, acts that take place in the
face of uncertain outcomes … after accidents … post hoc analysis regards these gambles as poor ones. But … successful outcomes are also the result of gambles …
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