I was very pleased to receive this Comment of the Day by Ryan Harkins on the post “Catching Up: Professional Ethics And The Challenger Disaster,” because it focuses on the ethics of risk, a great topic that EA hasn’t covered as well as it should.
I’ll have one brief note at the end.
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I was 4 and in preschool when the Challenger exploded. We watched the launch on TV before I went to school that day, and apparently it really disturbed me, because I bit another student and then hid under a table for the rest of the day.
Working at the refinery now, we get to revisit the Challenger explosion frequently (along with the Bhopal Union Carbide gas leak, the Texas City tanker explosion, the Texas City ISOM explosion, and a host of others) when discussing process safety. Michael West is absolutely right in that it isn’t simply a calculation of what the worst consequence is, but also the likelihood of that occurring.
Part of the reason the engineers’ concerns were dismissed was because the problem with the O-rings had been known and discussed for quite some time, and there had been numerous launches prior to this one that had been perfectly successful. In other words, NASA had gotten away with using the faulty O-rings before, so they saw no reason to be overly concerned this time around. Furthermore, the launch had already been delayed multiple times, and they were under intense pressure to launch. Why should they listen to the doom-saying of engineers when empirical evidence said the worst-case scenario was not going happen?
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