Electronics Manufacturing calculator

First Pass Test Yield Calculator

First-pass test yield shows how many assemblies clear ICT, functional test, or end-of-line test without debug, retest, or rework. This calculator gives the yield and gap to target for production and quality review.

What this calculator does

  • Measure first-pass test yield for PCB assemblies or electronic products against a target yield.
  • a quality engineer is reviewing test yield for a board family, product, or line
  • Returns the first pass test yield value for the selected electronics manufacturing scope.

Formula used

  • First-pass test yield = units passing first-pass test รท total units tested
  • Yield gap to target = target first-pass test yield - first-pass test yield

Inputs explained

  • Units passing first-pass test: Use a current, same-scope value for units passing first-pass test from the traveler, MES, ERP, test log, quote, or validated engineering estimate.
  • Total units tested: Use a current, same-scope value for total units tested from the traveler, MES, ERP, test log, quote, or validated engineering estimate.
  • Target first-pass test yield: Use a current, same-scope value for target first-pass test yield from the traveler, MES, ERP, test log, quote, or validated engineering estimate.

How to use the result

  • Use it when production, quality, test, procurement, or estimating teams need a defensible number before schedule or quote decisions.
  • It is an estimate and does not replace detailed routing, validated test programs, supplier DFM feedback, thermal profiling, capability studies, or yield-analysis models.

Common questions

  • What does the first pass test yield calculator tell me? It gives a first pass test yield result using electronics, PCB, or semiconductor production inputs that match the same lot, board family, wafer lot, or shift.
  • Which numbers should I enter? Use current values from CAD/CAM, BOM, MES, test logs, supplier quotes, or process records; keep the count, time, yield, and cost basis consistent.
  • How should I use the result? Use the result to support capacity checks, quote rollups, yield reviews, staffing decisions, material planning, or process-improvement priorities.
  • When is this only an estimate? Treat it as a planning estimate when product mix, setup time, operator assist time, feeder readiness, inspection disposition, test escapes, scrap, or supplier yield differs from the data used for the inputs.

Last reviewed 2026-05-12.