Understanding Rolled Throughput Yield
How we calculate. RTY = product of stage first-pass yields (as decimals). The form uses the same arithmetic as the worked examples on this page. See our methodology and accuracy policy.
Real-world scenario: A typical Rolled Throughput Yield case uses stage 1 fpy (%) 95 and stage 2 fpy (%) 98. Enter the same figures below to reproduce the worked path.
What is Rolled Throughput Yield?
A multi-step quality KPI. If each stage is 95% FPY, RTY is much lower than 95%—the product reveals hidden factory loss.
- Stage yields as percents
- Use 100% if a stage is N/A
- Order matches process flow
The Formula
Worked Example
Common Use Cases
- Value-stream maps: cumulative yield
- Process design: which step hurts most
- Supplier chains: multi-op FPY product
Pro Tips
- Don’t average stage yields
- Add more stages offline if needed
- Pair with single-step FPY
Limitations: Rolled Throughput Yield 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
Only three stages?
This form multiplies three yields. For more steps, compute offline or set unused stages to 100%.
Why is RTY lower than each stage?
Because defects compound: each stage multiplies the remaining first-pass fraction.
Authoritative References
For OEE and manufacturing KPI definitions, consult: