Rare Earth Magnet & Motor Materials worked example

Powder Yield at 68% target powder yield rate: a worked example

Suppose target powder yield rate falls to 68%. This page works the full calculation at that level so you can see exactly which result moves and by how much. Estimate powder yield for rare earth magnet and motor materials using production-ready inputs so teams can track KPI performance and decide whether corrective action is needed.

The inputs for this scenario

  • Conforming NdFeB powder lots (pass size and oxygen spec): 8 count (held at the documented default)
  • Total powder lots milled and screened: 250 count (held at the documented default)
  • Target powder yield rate: 68 % (the input this scenario stresses; the baseline uses 95)

Working through the calculation

  • The calculation starts from the formula this tool documents: Powder yield rate = powder yield count ÷ total powder yield population × 100.
  • Powder yield rate works out to 3.2 % at these inputs, and this is the headline figure for the scenario.
  • Powder yield gap to target works out to 64.8 points at these inputs.
  • Powder yield count works out to 8 count at these inputs.
  • Total powder yield population works out to 250 count at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where target powder yield rate sits at 95% and the headline result is 3.2 %, this scenario lands almost exactly on the baseline at 3.2 %.
  • It computes the percentage of powder lots that meet spec out of all lots processed, and how many points that sits below your 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

  • Powder yield rate: 3.2 % (headline result)
  • Powder yield gap to target: 64.8 points
  • Powder yield count: 8 count
  • Total powder yield population: 250 count

Run it with your numbers

  • To rerun this with your own numbers, open the live Powder Yield calculator, set target powder yield rate to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.