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Articles by John R. Murphy

John R. Murphy


John R. Murphy, PhD, is an independent consultant.
Zero-Tolerance Criteria Do Not Assure Product Quality
January 1, 2006
By: John R. Murphy , Kristi L. Griffiths

The benefits of zero tolerance as a test criterion have been oversold. A critical examination of zero tolerance reveals that many of the supposed benefits are not attainable. More important, inappropriate application of this criterion can have a deleterious effect on the assessment, control, and improvement of the quality of pharmaceutical products.

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