And yet, deadly disasters do happen. https://en.wikipedia.org/wiki/Sayano-Shushenskaya_power_station_accident https://en.wikipedia.org/wiki/Sayano-Shushenskaya

And yet, deadly disasters do happen. https://en.wikipedia.org/wiki/Sayano-Shushenskaya_power_station_accident https://en.wikipedia.org/wiki/Sayano-Shushenskaya_power_stat... Key: "It seems they were used to the high levels of vibration" - Diane Vaughan wrote an important book that introduced the term "normalisation of deviance" as a factor in the Challenger Launch Decision, a more famous complex accident. Another way of putting it is that "all complex systems operate in a degraded mode all the time", paraphrasing Adrian Colyer: https://blog.acolyer.org/2016/02/10/how-complex-systems-fail https://blog.acolyer.org/2016/02/10/how-complex-systems-fail