Implantable Electronics & Neurodevices worked example

Warranty Reserve at 0.92% expected service incidence: a worked example in implantable electronics & neurodevices

This scenario runs the warranty reserve calculation on the strong side: 0.92% expected service incidence, with every other input held at its documented default. Use it when finance, quality, or program teams need a reserve estimate for service events, replacements, explant analysis, or support obligations.

The inputs for this scenario

  • Shipped implantable devices in reserve scope: 12,000 devices (unchanged)
  • Expected service cost per affected device: 1,450 $ / device (unchanged)
  • Expected service incidence: 0.92 % (raised for this scenario; the documented default is 0.8)
  • Fixed field support reserve adders: 75,000 $ (unchanged)

Working through the calculation

  • Applying the documented formula (Variable warranty reserve = shipped implantable devices in reserve scope × expected service cost per affected device × expected service incidence) to the inputs above produces each figure below.
  • At this operating point the engine returns 235,080 $ for total warranty reserve, the number this scenario is built around.
  • At this operating point the engine returns 19.59 $ / device for warranty reserve per shipped device.
  • At this operating point the engine returns 160,080 $ for variable warranty reserve.
  • At this operating point the engine returns 75,000 $ for fixed field support reserve adders.

How this compares with the baseline

  • Against the tool's baseline example, where expected service incidence sits at 0.8% and the headline result is 214,200 $, this scenario comes in 9.75% above the baseline at 235,080 $.
  • Use it at period close, at product launch, or when reliability data shifts the expected service incidence for a shipped implantable cohort. Treat this as a target state: the delta against the baseline quantifies what the improvement is worth before you commit to chasing it.

Results at a glance

  • Total warranty reserve: 235,080 $ (headline result)
  • Warranty reserve per shipped device: 19.59 $ / device
  • Variable warranty reserve: 160,080 $
  • Fixed field support reserve adders: 75,000 $

Run it with your numbers

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

Last reviewed 2026-05-12.