Bob Metz

Bob Metz is pressure force product manager at PCB Piezotronics Inc. (Depew, NY). For more information, call (888) 684-0004, e-mail or visit


The End of Overtesting

A major cause of overtesting of spacecraft, aerospace and flight hardware during random and swept sine vibration tests is associated with differences between the mechanical impedance of the shaker and mounting fixture, and the standard practice of controlling the input acceleration to the frequency envelope of the flight data. The result is artificially high shaker forces and responses at the resonance frequencies of the test item. These high forces can damage expensive payloads.
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Charles J. Hellier has been active in the technology of nondestructive testing and related quality and inspection fields since 1957. Here he talks with Quality's managing editor, Michelle Bangert, about the importance of training.
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Quality Magazine


2015 February

The February 2015 edition of Quality Magazine includes this years Leadership 100.

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The Skills Gap

What is the key to solving the so-called skills gap in the quality industry?
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