Work out first pass yield instantly with clear inputs, formula shown and shareable results.
First pass yield counts only units that come through right the first time. Because sequential steps compound, rolled throughput yield is the per-step yield raised to the number of steps — which is why a line of ten 97% operations delivers barely 74% clean output.
First pass yield
FPY % = Units passing first time / Units entering x 100
Rolled throughput yield
RTY = FPY ^ Number of steps
The capacity consumed by inspection, rework and retest that never appears in the output figures. FPY is the standard way to make it visible.
Yes. Any unit that did not pass cleanly the first time fails FPY, regardless of whether it was later rescued.