Procurement & Supply Chain / Supplier Quality
Supplier Defect Rate PPM (aliases: defective PPM, DPMO, incoming reject rate, quality PPM)
How many defective parts a supplier ships, usually expressed in parts per million.
The fork, why two teams get different numbers
What counts as a defect, where it's caught, and the unit base.
In the Metric Library
- The full fork, both definitions worked all the way through
- The trap that makes the number lie, on a real export
- Every formula variant, spelled out
- The reconciliation anchor, what to tie it to and when to refuse
Reference: APICS/SCOR (Reliability, quality) · ISM · AIAG (PPAP / quality reference)