EV & Battery Manufacturing worked example

EV End-of-Line Test Yield at 69% target eol first-pass yield: a worked example

Suppose target eol first-pass yield falls to 69%. This page works the full calculation at that level so you can see exactly which result moves and by how much. Calculate first-pass EOL test yield for vehicles, packs, modules, or power electronics.

The inputs for this scenario

  • Units passing EOL first time: 940 units (held at the documented default)
  • Total units EOL tested: 1,000 units (held at the documented default)
  • Target EOL first-pass yield: 69 % (the input this scenario stresses; the baseline uses 96)

Working through the calculation

  • The calculation starts from the formula this tool documents: EOL first-pass yield = units passing EOL first time รท total units EOL tested.
  • EOL first-pass yield works out to 94 % EOL FPY at these inputs, and this is the headline figure for the scenario.
  • EOL yield gap to target works out to -25 points at these inputs.
  • First-pass EOL passes works out to 940 units at these inputs.
  • Units EOL tested works out to 1,000 units at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where target eol first-pass yield sits at 96% and the headline result is 94 % EOL FPY, this scenario lands almost exactly on the baseline at 94 % EOL FPY.
  • It computes the fraction of EOL-tested units that pass on the first attempt as a percent, and the gap in points between that and your FPY target. When the numbers land here, the stressed input is the lever to work; the walkthrough above shows exactly how much each output recovers as it climbs back toward the baseline.

Results at a glance

  • EOL first-pass yield: 94 % EOL FPY (headline result)
  • EOL yield gap to target: -25 points
  • First-pass EOL passes: 940 units
  • Units EOL tested: 1,000 units

Run it with your numbers

  • To rerun this with your own numbers, open the live EV End-of-Line Test Yield calculator, set target eol first-pass yield to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.