Industrial testing guide
First-Pass Yield
Measure how much output passes a process step without rework or repair.
Quality note: real acceptance criteria, test methods and sampling requirements come from applicable specifications, standards and qualified technical authority—not from generic web guidance.
What this topic covers
Measure how much output passes a process step without rework or repair.
Core testing ideas
First-pass yield distinguishes initially conforming product from later recovery.
Low FPY can expose hidden factory cost even when final yield appears high.
Definitions should be consistent across lines and reporting periods.
Measurement and method limits
SPC and capability metrics describe process behaviour, while engineering specifications describe product requirements.
Evidence and traceability
Nonconformance, corrective action, audits and supplier controls close the loop when results do not meet expectations.
Using the result
Quality metrics should be defined consistently so improvement is real rather than a reporting artifact.