Reject rate
- Glossary
Percentage of non-conforming products at the end of a production process. The reject rate is an indicator used in quality management and quality control.
PPM: parts per million
- Glossary
The PPM rate is frequently used as a performance quality indicator of a process in terms of non-conforming materials, particularly in the automotive sector. It measures the number of nonconforming parts per million parts produced or delivered. (It may contain rejected/ returned or suspected materials as well.)