How can repeated exceptions make a warning sign seem normal?
A warning can start to feel routine when earlier incidents did not end in disaster. A NASA engineer’s retrospective on Columbia describes how previous foam strikes became a reason to discount concern, even though a safe landing had not demonstrated that the underlying problem was harmless.
Questions you could explore
- What evidence would distinguish an understood risk from a risk that has merely been tolerated?
Start reading
- NASA Technical Reports ServerShuttle Columbia, Mission STS-107
This NASA presentation examines uncertainty, communication and repeated foam strikes during the 2003 case. It is a retrospective engineering account, not proof that every tolerated exception leads to disaster.
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