Operations / Six Sigma
Defect Rate (DPU / DPMO / PPM) DPU, DPMO, PPM
How often things go wrong, but counted as flaws-per-unit, flaws-per-opportunity, or bad-units-per-million depending on who is asking.
The fork, why two teams get different numbers
Two forks.
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: Six Sigma (DPMO · process sigma · 1.5σ shift convention) · ASQ quality terminology