Rolled Throughput Yield (RTY) Calculator
See the true end-to-end yield of your process — multiply each step's first-pass yield into one rolled throughput yield. Free, instant and fully in your browser.
Enter the first-pass yield (%) of each step. Leave unused steps blank.
Rolled Throughput Yield
94.11%
3 steps counted
RTY = FPY1 × FPY2 × … × FPYn
RTY multiplies first-pass yields, so it is always lower than any single step — small per-step losses compound fast.
What is Rolled Throughput Yield?
Rolled Throughput Yield (RTY) is the probability that a unit passes every process step first time, with no rework. It is the product of each step's first-pass yield. Because losses multiply, a process with several good-looking 97–99% steps can still have a much lower true yield. RTY exposes the hidden factory of rework that step-level metrics hide.
How to calculate RTY
- 1
Find each step's first-pass yield
For each step, divide units that pass first time (no rework) by units that entered.
- 2
Enter the yields
Type each step's first-pass yield as a percentage; leave unused steps blank.
- 3
Read RTY
RTY is the product of all step yields — the true end-to-end first-pass rate.
Frequently asked questions
Why is RTY lower than my step yields?
Because yields multiply. Five steps at 98% give about 90% RTY — each small loss compounds, so the end-to-end figure is always below the weakest step.
What is the difference between FPY and RTY?
First-Pass Yield (FPY) is for a single step; Rolled Throughput Yield (RTY) rolls all the step FPYs together into one process-wide figure.
How does Yamazo Studio help?
Yamazo Studio surfaces where rework and waste (MUDA) happen in the work itself, so you can attack the steps dragging your RTY down with standard work and error-proofing.
Related lean tools & guides
See the hidden factory, then shrink it
RTY reveals compounded rework. Yamazo Studio turns shop-floor video into the waste analysis and standard work that lift first-pass yield — one offline Lean Operating Desk.
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