Understanding Rolled Throughput Yield
How we calculate. RTY = product of stage first-pass yields (as decimals). 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
| Scenario | When to use |
|---|---|
| Percent of a number | Finding a part of a whole (tax, tip, score) |
| Percent change | Comparing old vs new values |
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.
Common mistakes
- Swapping part and whole: The denominator must be the full total, not a subset.
- Rounding too early: Carry extra decimal places through multi-step work before rounding the final percent.
- Mixing percent and decimal forms: Enter rates in the format the calculator labels expect.
When to use this calculator
- Use this page when your wording matches rolled throughput yield and the form labels on screen.
- Use percent of a number for “what is X% of Y?” problems.
- Use number is what percent when you know part and whole and need the percent.
Still unsure about rolled throughput yield? Start with the quick answer above, then open the linked calculator that matches your wording.
❓ Frequently Asked Questions
How do I use this rolled throughput yield calculator?
For rolled throughput yield, enter the values labeled on the form, then press Calculate. Compare the result to the worked example on this page.
What formula does this page use?
See the quick answer and formula box above for rolled throughput yield—the same percentage calculator expression is applied to your inputs.
What if my result looks wrong?
When checking rolled throughput yield, re-check part vs whole (or rate vs base), rounding, and whether percents were entered as 25 rather than 0.25 when the form expects percents.
Authoritative References
For OEE and manufacturing KPI definitions, consult: