Power Electronics, Motors & Drives worked example

Power Module Rework Rate at 68% target maximum rework rate: a worked example

This worked example runs the power module rework rate numbers for a tougher week than the baseline: 68% target maximum rework rate instead of the typical 95%. Calculate power module rework rate from modules needing rework, total modules built or tested, and the target rework limit.

The inputs for this scenario

  • Power modules requiring rework: 8 modules (held at the documented default)
  • Total power modules built or tested: 250 modules (held at the documented default)
  • Target maximum rework rate: 68 % (the input this scenario stresses; the baseline uses 95)

Working through the calculation

  • The calculation starts from the formula this tool documents: Power module rework rate = power modules requiring rework ÷ total power modules built or tested × 100.
  • Power module rework rate works out to 3.2 % at these inputs, and this is the headline figure for the scenario.
  • Rework gap to target works out to 64.8 points at these inputs.
  • Power modules requiring rework works out to 8 count at these inputs.
  • Total power modules built or tested works out to 250 count at these inputs.

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 %.
  • Use it at end-of-shift or per production lot to trend first-pass quality on a power module assembly or test line. A result at this level usually justifies acting on the stressed input before touching anything else, because every other figure in the table is downstream of it.

Results at a glance

  • Power module rework rate: 3.2 % (headline result)
  • Rework gap to target: 64.8 points
  • Power modules requiring rework: 8 count
  • Total power modules built or tested: 250 count

Run it with your numbers

  • To rerun this with your own numbers, open the live Power Module Rework Rate calculator, set target maximum rework rate to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.