Understanding Quality Rate
How we calculate. Quality % = good count ÷ total count × 100. The form uses the same arithmetic as the worked examples on this page. See our methodology and accuracy policy.
Real-world scenario: A typical Quality Rate case uses good units 792 and total units 800. Enter the same figures below to reproduce the worked path.
What is Quality Rate?
The OEE quality factor. Scrap, rework that fails first pass, and defectives typically reduce the good count per your quality SOP.
- Good = first-quality sellable per policy
- Total = all units in the sample
- Pairs with scrap and FPY
The Formula
Worked Example
Common Use Cases
- OEE build: quality factor
- Shift QA: good-unit yield
- Customer claims: outgoing quality
Pro Tips
- Align rework rules with FPY
- Don’t hide sorted scrap
- Feed the OEE calculator
Limitations: Quality Rate results are educational manufacturing and lean/TPM planning aids—not process-safety, quality-system, or financial advice. Confirm definitions with your MES/SCADA and quality policies.
FAQ
Is rework “good”?
Only after it meets spec—and FPY usually still counts the first failure. Follow your quality SOP.
What if total units is 0?
Quality rate is undefined—enter a positive total count.
Authoritative References
For OEE and manufacturing KPI definitions, consult: