Power Electronics, Motors & Drives worked example

Power Module Rework Rate at 99% target maximum rework rate: a worked example

What does the result look like when target maximum rework rate reaches 99%? The full calculation is worked below with real intermediate numbers. Use it when tracking rework from wire bond, solder void, substrate attach, partial discharge, thermal interface, or electrical test defects.

The inputs for this scenario

  • Power modules requiring rework: 8 modules (unchanged)
  • Total power modules built or tested: 250 modules (unchanged)
  • Target maximum rework rate: 99 % (raised for this scenario; the documented default is 95)

Working through the calculation

  • Applying the documented formula (Power module rework rate = power modules requiring rework ÷ total power modules built or tested × 100) to the inputs above produces each figure below.
  • At this operating point the engine returns 3.2 % for power module rework rate, the number this scenario is built around.
  • At this operating point the engine returns 95.8 points for rework gap to target.
  • At this operating point the engine returns 8 count for power modules requiring rework.
  • At this operating point the engine returns 250 count for total power modules built or tested.

How this compares with the baseline

  • Against the tool's baseline example, where target maximum rework 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 maximum rework rate is genuinely sustained, not just peaked for a shift. It counts modules touched by rework but says nothing about defect type or whether rework restored full reliability — pair it with a Pareto of failure modes.

Results at a glance

  • Power module rework rate: 3.2 % (headline result)
  • Rework gap to target: 95.8 points
  • Power modules requiring rework: 8 count
  • Total power modules built or tested: 250 count

Run it with your numbers

  • Every input above is editable in the live Power Module Rework Rate calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.