OEE & Factory Performance worked example

First Pass Yield for OEE at 99% target fpy: a worked example

Push target fpy up to 99% and the picture changes. This example computes every intermediate figure at that operating point. Use it to track first pass yield against target in OEE & Factory Performance.

The inputs for this scenario

  • First-pass good units: 940 units (unchanged)
  • Total units started: 1,000 units (unchanged)
  • Target FPY: 99 % (raised for this scenario; the documented default is 95)

Working through the calculation

  • Applying the documented formula (First pass yield = first-pass good units ÷ total units started × 100) to the inputs above produces each figure below.
  • At this operating point the engine returns 94 % for first pass yield, the number this scenario is built around.
  • At this operating point the engine returns 5 points for gap to target.
  • At this operating point the engine returns 940 count for first-pass good units.
  • At this operating point the engine returns 1,000 count for total units started.

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. The value of this scenario is the size of the gap it exposes: that gap, priced out over a year, is the budget you can justify spending to close it.

Results at a glance

  • First pass yield: 94 % (headline result)
  • Gap to target: 5 points
  • First-pass good units: 940 count
  • Total units started: 1,000 count

Run it with your numbers

  • Every input above is editable in the live First Pass Yield for OEE calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.