Chapter 1. The History of Reliability and Safety Technology
Safety/Reliability engineering did not develop as a unified discipline, but grew out of the integration of a number of activities, previously the province of various branches of engineering.
Since no human activity can enjoy zero risk, and no equipment has a zero rate of failure, there has emerged a safety technology for optimizing risk. This attempts to balance the risk of a given activity against its benefits and seeks to assess the need for further risk reduction depending upon the cost.
Similarly, reliability engineering, beginning in the design phase, attempts to select the design compromise that balances the cost of reducing failure rates against the value of the enhanced performance. ...
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