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Why: Design reviews should demonstrate by calculation or through the use of models and reliability tools that the system is capable of achieving the design objects rather than making a giant leap of faith that all will be well and good.

When: Design reviews for reliability should be a part of the design process starting with conceptual designs and ending when the drawings are revised for the as-built system.

Where: This is a logical extension of the design process to show me rather than tell me how the system will function and is performed as a portion of the up-front design by the numbers process.

These definitions are written by H. Paul Barringer and are also posted on his web site at

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