Implantable Electronics & Neurodevices worked example

Rework Cost at 4.32% expected implant rework rate: a worked example in implantable electronics & neurodevices

Here is what the math looks like when conditions slip. We hold every other input steady and drop expected implant rework rate to 4.32%, then walk the calculation through step by step. Estimate implantable device rework cost from build quantity, rework cost per affected unit, expected rework rate, and fixed setup adders.

The inputs for this scenario

  • Implant devices in the rework lot: 420 devices (held at the documented default)
  • Labor and materials cost per reworked implant: 165 $ / device (held at the documented default)
  • Expected implant rework rate: 4.32 % (the input this scenario stresses; the baseline uses 6)
  • Fixed rework setup, fixturing, and verification adders: 2,400 $ (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Variable rework cost = build quantity in rework scope × cost per reworked device × expected rework rate.
  • Total rework cost works out to 5,394 $ at these inputs, and this is the headline figure for the scenario.
  • Rework cost per device in scope works out to 12.84 $ / device at these inputs.
  • Variable rework cost works out to 2,994 $ at these inputs.
  • Fixed rework setup and verification adders works out to 2,400 $ at these inputs.

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 17.75% below the baseline at 5,394 $.
  • The practical read: the gap between this scenario and the baseline is entirely attributable to expected implant rework rate, so recovering it is worth quantifying in dollars before considering equipment or staffing changes. 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: 5,394 $ (headline result)
  • Rework cost per device in scope: 12.84 $ / device
  • Variable rework cost: 2,994 $
  • Fixed rework setup and verification adders: 2,400 $

Run it with your numbers

  • To rerun this with your own numbers, open the live Rework Cost calculator, set expected implant rework rate to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.