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Nasa space shuttle 19864/4/2023 ![]() ![]() What are the causes and consequences of this lack of agreement?” According to post-disaster analysis, NASA’s management culture in the mid-1980s was strongly biased against the methods of risk assessment that would have highlighted the likelihood of a disaster. The higher figures come from working engineers, and the very low figures from management. The estimates range from roughly 1 in 100 to 1 in 100,000. NASA had observed O-rings behaving in unusual and unanticipated ways during previous flights but had made the decision that as long as there was no cataclysmic failure of the equipment, this was an acceptable deviation, a phenomenon referred to as “normalization of deviance.”įeynman produced an appendix to the final report in which he wrote: “It appears that there are enormous differences of opinion as to the probability of a failure with loss of vehicle and of human life. In addition to the faulty initial design of the O-rings, the Commission determined that the unusually cold temperatures at the time of the launch (conditions in which none of the dependent systems on the Space Shuttle had ever been tested) meant that the rubber O-rings became inflexible and allowed the flow of gas to escape and ignite, a failure demonstrated by committee member Richard Feynman on live television during the inquiry. The Rogers Commission – the body tasked with investigating the disaster – found that the O-ring design had been a point of concern for several years prior to the disaster, but that any concerns had been either poorly communicated or ignored in favor of maintaining project delivery on-time and on-budget. The official cause of the disaster was the failure of an O-ring to prevent hot gases from leaking through the joint in the solid rocket motor during launch. Seven crew members died, a $3 billion-dollar orbital vehicle was lost, and NASA’s Space Shuttle program was suspended for 32 months. On January 28, 1986, the Space Shuttle Challenger was destroyed 73 seconds after lifting off from Cape Canaveral, Florida.
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