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for their analysis and may require input from each other. It can be said that a system must be reliably safe.

Reliability engineering focuses on the costs of failure caused by the system downtime, cost of spares, repair equipment, personnel, and cost of warranty claims.

History

The word reliability can be traced back to 1816 and is first attested to the poet Samuel Taylor Coleridge. Before World War II the term was linked mostly to repeatability;

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