Quality must be considered as embracing all factors which contribute to reliable and safe operation. What is needed is an atmosphere, a subtle attitude, an uncompromising insistence on excellence, as well as a healthy pessimism in technical matters, a pessimism which offsets the normal human tendency to expect that everything will come out right and that no accident can be foreseen -- and forestalled -- before it happens.
-- Hyman Rickover, founder of the US Navy Nuclear fleet.
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Thank the LORD that guy was in charge.