Implantable Electronics & Neurodevices worked example

Rework Cost at 6.9% expected implant rework rate: a worked example in implantable electronics & neurodevices

What does the result look like when expected implant rework rate reaches 6.9%? The full calculation is worked below with real intermediate numbers. Use it when manufacturing or quality teams need to cost rework for leads, electrodes, hermetic packages, PCBAs, encapsulation, or final test failures.

The inputs for this scenario

  • Implant devices in the rework lot: 420 devices (unchanged)
  • Labor and materials cost per reworked implant: 165 $ / device (unchanged)
  • Expected implant rework rate: 6.9 % (raised for this scenario; the documented default is 6)
  • Fixed rework setup, fixturing, and verification adders: 2,400 $ (unchanged)

Working through the calculation

  • Applying the documented formula (Variable rework cost = build quantity in rework scope × cost per reworked device × expected rework rate) to the inputs above produces each figure below.
  • At this operating point the engine returns 7,182 $ for total rework cost, the number this scenario is built around.
  • At this operating point the engine returns 17.1 $ / device for rework cost per device in scope.
  • At this operating point the engine returns 4,782 $ for variable rework cost.
  • At this operating point the engine returns 2,400 $ for fixed rework setup and verification adders.

How this compares with the baseline

  • Against the tool's baseline example, where expected implant rework rate sits at 6% and the headline result is 6,558 $, this scenario comes in 9.51% above the baseline at 7,182 $.
  • A figure at this level is achievable when expected implant rework rate is genuinely sustained, not just peaked for a shift. It assumes a single flat cost per reworked device; mixed defect modes with very different repair effort (a reflow touch-up vs. a hermetic seal repair) need to be costed separately.

Results at a glance

  • Total rework cost: 7,182 $ (headline result)
  • Rework cost per device in scope: 17.1 $ / device
  • Variable rework cost: 4,782 $
  • Fixed rework setup and verification adders: 2,400 $

Run it with your numbers

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

Last reviewed 2026-05-12.