Metric · Reliability & Quality
PPM (Parts Per Million)
A general rate unit meaning one in a million, used for defect levels, contamination concentrations and impurity limits. In quality reporting it is normally shorthand for defective parts per million.
- Type
- Metric
- Domain
- Reliability & Quality, Quality systems
Notes
Context matters because the same acronym also denotes material purity and temperature coefficients in component datasheets.
Related terms
Part of the Reliability & Quality glossary, with every term in the topic and the lifecycles, tools and standards that use them.
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