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The problem with Perrow’s idea that organizations could not safely function with interactive complexity and tight coupling was that so many such organizations did in fact function without mishap for years, even decades. Nuclear power plants operated without incident nearly all the time. So did air traffic control systems, nuclear aircraft carriers, and a host of other inherently risky operations. A small group of researchers led by Karlene Roberts at the University of California, Berkeley, set out to study how they did it. What they discovered was more behavioral than technical. The term high reliability organization, or HRO, captures the essence of the theory. HROs are reliably safe because of how they make everyone in them feel accountable to one another for practices that consistently catch and correct

deviations to prevent major harm. Vigilance is one word for it. But it’s more than that. To me the most interesting part of HRO research is the observation that rather than downplaying failure, people in HROs are obsessed with failure. My colleagues Karl Weick, Kathie Sutcliffe, and David Obstfeld wrote a seminal paper highlighting the culture of HROs as preoccupied with failure, reluctant to simplify, acutely sensitive to ongoing operations (quick to detect subtle unexpected changes), committed to resilience (catching and correcting error,

rather than expecting error-free operations), and valuing expertise over rank. In other words, HROs are weird places. Rather than holding back to see what the boss is thinking, people there don’t hesitate to speak up immediately. A frontline associate, to avert a crisis, can tell the CEO what to do. Failure is clearly seen as an ever-present risk that can nonetheless be consistently averted.