Multiply individual process step yields together to reveal true end-to-end performance — exposing hidden defects and the cumulative impact of variation across a multi-step process.
Enter your values on the left, then press Calculate.
The probability of a unit passing through every step defect-free is the product of each step's yield. Five steps at 95% each look fine individually but only deliver 77% RTY — a quarter of units have a defect somewhere.
RTY exposes the "hidden factory" of rework, scrap and inspection that plant-level yield numbers usually mask. Final yield can be 99% only because rework loops are quietly catching upstream defects.
The weakest step has the biggest leverage on RTY. Lifting the worst step from 90% to 98% will improve RTY more than any other change — even tiny improvements at the worst step beat moderate ones at already-strong steps.