Near misses lead people to take unwise risks. Rather than urgency, near misses create complacency. In studies, people who have information about near misses make riskier decisions than those with no information about them.49 Even though the actual risk of failure remains the same after a near miss, our perception of the risk decreases.50 At NASA, the management interpreted each near miss not as a potential problem, but as data that confirmed its belief that O-ring damage or foam shedding weren’t risk factors and wouldn’t compromise the mission. The managers had a perfect string of successes.
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