Industrial Sensors & Instrumentation worked example

Sensor Warranty Reserve at 2.3% historical warranty claim rate: a worked example

What does the result look like when historical warranty claim rate reaches 2.3%? The full calculation is worked below with real intermediate numbers. Use this when setting warranty accruals for sensor product lines, comparing warranty exposure across product families, or budgeting for expected field returns in the warranty period.

The inputs for this scenario

  • Sensors shipped in the period: 500 sensors (unchanged)
  • Average replacement cost per warranty claim: 220 $ / claim (unchanged)
  • Historical warranty claim rate: 2.3 % (raised for this scenario; the documented default is 2)
  • Fixed warranty administration cost: 1,500 $ (unchanged)

Working through the calculation

  • Applying the documented formula (Variable warranty cost = sensors shipped x replacement cost per claim x (claim rate / 100)) to the inputs above produces each figure below.
  • At this operating point the engine returns 4,030 $ for total warranty reserve, the number this scenario is built around.
  • At this operating point the engine returns 8.06 $ / piece for warranty accrual per sensor shipped.
  • At this operating point the engine returns 2,530 $ for variable warranty cost.
  • At this operating point the engine returns 1,500 $ for fixed warranty administration.

How this compares with the baseline

  • Against the tool's baseline example, where historical warranty claim rate sits at 2% and the headline result is 3,700 $, this scenario comes in 8.92% above the baseline at 4,030 $.
  • A figure at this level is achievable when historical warranty claim rate is genuinely sustained, not just peaked for a shift. It uses a single historical claim rate, so it misses front-loaded infant-mortality failures or a bad-lot spike that pushes real claims well above the average.

Results at a glance

  • Total warranty reserve: 4,030 $ (headline result)
  • Warranty accrual per sensor shipped: 8.06 $ / piece
  • Variable warranty cost: 2,530 $
  • Fixed warranty administration: 1,500 $

Run it with your numbers

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

Last reviewed 2026-05-12.