Rare Earth Magnet & Motor Materials worked example

Dimensional Yield at 99% target dimensional yield rate: a worked example in rare earth magnet & motor materials

What does the result look like when target dimensional yield rate reaches 99%? The full calculation is worked below with real intermediate numbers. Use it when dimensional yield in rare earth magnet and motor materials needs a clean rate and gap-to-target you can put on a tier board.

The inputs for this scenario

  • Magnets within dimensional tolerance: 8 count (unchanged)
  • Magnets gauged in the lot: 250 count (unchanged)
  • Target dimensional yield rate: 99 % (raised for this scenario; the documented default is 95)

Working through the calculation

  • Applying the documented formula (Dimensional yield rate = dimensional yield count ÷ total dimensional yield population × 100) to the inputs above produces each figure below.
  • At this operating point the engine returns 3.2 % for dimensional yield rate, the number this scenario is built around.
  • At this operating point the engine returns 95.8 points for dimensional yield gap to target.
  • At this operating point the engine returns 8 count for dimensional yield count.
  • At this operating point the engine returns 250 count for total dimensional yield population.

How this compares with the baseline

  • Against the tool's baseline example, where target dimensional yield rate sits at 95% and the headline result is 3.2 %, this scenario lands almost exactly on the baseline at 3.2 %.
  • A figure at this level is achievable when target dimensional yield rate is genuinely sustained, not just peaked for a shift. It is a pass/fail count and does not tell you which dimension failed or by how much, so pair it with actual measurement data for root cause.

Results at a glance

  • Dimensional yield rate: 3.2 % (headline result)
  • Dimensional yield gap to target: 95.8 points
  • Dimensional yield count: 8 count
  • Total dimensional yield population: 250 count

Run it with your numbers

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

Last reviewed 2026-05-12.