First pass yield vs rolled throughput yield: expose the rework path
Calculate stage yield and cumulative first-time success, keep rework visible, and avoid averaging percentages across incompatible populations.
First-pass yield (FPY)
Share of units accepted without rework or retest.
The percentage of units that meet requirements the first time through a process without rework, repair, or retest. FPY exposes hidden quality cost that a final pass rate can conceal.
See also: Statistical process control (SPC) · Nonconformance · OEE
Use the concept: Cp, Cpk, Pp & Ppk calculator · Downtime log template · MTBF, MTTR & availability calculator
In depth
OEE loss trees: make availability, performance, and quality actionable
Why one OEE percentage is not a diagnosis, and how a loss tree turns downtime, speed loss, and defects into work the plant can actually prioritize.
Gauge R&R: how much variation is the gauge?
A gauge R&R study separates measurement error from real part-to-part variation, so you can tell whether a tolerance decision is trustworthy.