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Knowledgebase: Reliability and QA FAQs
What are DPPM, FIT, and MTBF?
Posted by - NA - on 26 January 2008 06:53 AM

DPPM (Defective Parts Per Million): A ratio calculated by dividing the number of failures returned from the field by the number of products shipped.

FIT (Failure In Time): Defined as the number of failures for every 1,000,000,000 hours of operation.

MTBF (Mean Time Between Failure): The amount of time until equipment malfunction.This index is normally used for equipment that is repeatedly fixed.

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