University of Manchester
James Reason
Known for:The Swiss cheese model of accident causation — the foundational framework showing that complex system failures require multiple simultaneous holes in defensive barriers, not a single reckless actor
Key findings
- 1990
In Human Error, Reason argues that accidents in complex systems result from the alignment of multiple latent failures across organizational, supervisory, and operational levels — not from a single person's mistake. This reframes 'who to blame' as 'what conditions allowed this.' ↗