Physics of Failure Versus Handbook Reliability Prediction
Handbook prediction gives a comparable number with no mechanism; physics of failure gives a mechanism, a stress and a life with no single number. The debate is the field's defining methodological argument, and Willoughby's rejection of what he called the game of random nines — his refusal to manage reliability through predictive mathematics rather than design and manufacturing discipline — is one of its founding statements.
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Handbook prediction gives a comparable number with no mechanism; physics of failure gives a mechanism, a stress and a life with no single number. The debate is the field's defining methodological argument, and Willoughby's rejection of what he called the game of random nines — his refusal to manage reliability through predictive mathematics rather than design and manufacturing discipline — is one of its founding statements.
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