Electronics Repair, Refurbishment & Depot Operations worked example

No-Fault-Found Rate at 99% target no-fault-found rate: a worked example

Push target no-fault-found rate up to 99% and the picture changes. This example computes every intermediate figure at that operating point. Use it when no-fault-found rate in electronics repair, refurbishment and depot operations needs a clean rate and gap-to-target you can put on a tier board.

The inputs for this scenario

  • Units returned with no fault found: 8 units (unchanged)
  • Total diagnosed RMA units: 250 units (unchanged)
  • Target no-fault-found rate: 99 % (raised for this scenario; the documented default is 95)

Working through the calculation

  • Applying the documented formula (No-fault-found rate = no-fault-found RMA units ÷ total diagnosed RMA units × 100) to the inputs above produces each figure below.
  • At this operating point the engine returns 3.2 % for no-fault-found rate, the number this scenario is built around.
  • At this operating point the engine returns 95.8 points for no-fault-found gap to target.
  • At this operating point the engine returns 8 count for no-fault-found rma units.
  • At this operating point the engine returns 250 count for total diagnosed rma units.

How this compares with the baseline

  • Against the tool's baseline example, where target no-fault-found rate sits at 95% and the headline result is 3.2 %, this scenario lands almost exactly on the baseline at 3.2 %.
  • It computes the percentage of diagnosed RMA units that were returned but had no reproducible fault, then shows the gap to your target rate. The value of this scenario is the size of the gap it exposes: that gap, priced out over a year, is the budget you can justify spending to close it.

Results at a glance

  • No-fault-found rate: 3.2 % (headline result)
  • No-fault-found gap to target: 95.8 points
  • No-fault-found RMA units: 8 count
  • Total diagnosed RMA units: 250 count

Run it with your numbers

  • Every input above is editable in the live No-Fault-Found Rate calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.