Incomplete hazard identification is a principal cause of safety assurance failures
2 events · 1 assessment
Assessed Supported
verdict confidence 0.70 · credence 0.75
The claim rests on a structural fact about safety assurance: a safety case can only assess and control the hazards its analysis identifies, so a hazard missed at identification passes through the entire assurance process unexamined. The empirical record gives this real weight. Accident investigations frequently find hazards that prior hazard analyses failed to identify, and the systems-theoretic safety literature argues that traditional hazard analysis techniques systematically miss interaction hazards in complex software-intensive systems, making incompleteness of identification an expected, not incidental, gap. The credible qualification concerns causal primacy rather than existence. Major assurance failures often involve hazards that were identified but inadequately assessed or controlled: the Nimrod XV230 fire hazard had been raised in the safety case and mis-sentenced, and the Challenger O-ring erosion was known before the accident. Organizational failure and biased evaluation of known hazards therefore compete with incomplete identification as the driving cause, and related work holds that safety cases are prone to confirmation bias toward a predetermined conclusion of safety. Because the claim asserts that incomplete identification is a principal cause rather than the sole or dominant one, this rival pattern coexists with it rather than refuting it. What would sharpen the verdict is systematic frequency data from accident investigations on how often the causal hazard was absent from the prior analysis versus present but mismanaged; the studies that exist point toward unidentified hazards being disproportionately represented among accident causes, but they are domain-specific.
Claim entered the graph