OEE & Factory Performance worked example

First Pass Yield for OEE at 68% target fpy: a worked example

Suppose target fpy falls to 68%. This page works the full calculation at that level so you can see exactly which result moves and by how much. Calculate first pass yield for OEE & Factory Performance: units that pass first time as a share of all units started.

The inputs for this scenario

First-pass good units: 940 units (held at the documented default)
Total units started: 1,000 units (held at the documented default)
Target FPY: 68 % (the input this scenario stresses; the baseline uses 95)

Working through the calculation

The calculation starts from the formula this tool documents: First pass yield = first-pass good units ÷ total units started × 100.
First pass yield works out to 94 % at these inputs, and this is the headline figure for the scenario.
Gap to target works out to -26 points at these inputs.
First-pass good units works out to 940 count at these inputs.
Total units started works out to 1,000 count at these inputs.

How this compares with the baseline

Against the tool's baseline example, where target fpy sits at 95% and the headline result is 94 %, this scenario lands almost exactly on the baseline at 94 %.
It computes the percentage of units that were good on the first attempt out of all units started, plus the point gap to your target FPY. 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

First pass yield: 94 % (headline result)
Gap to target: -26 points
First-pass good units: 940 count
Total units started: 1,000 count

Run it with your numbers

To rerun this with your own numbers, open the live First Pass Yield for OEE calculator, set target fpy to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.