Space Payload & Avionics Manufacturing worked example

Warranty Reserve at 17% forecast claim rate: a worked example in space payload & avionics manufacturing

What does the result look like when forecast claim rate reaches 17%? The full calculation is worked below with real intermediate numbers. A program finance lead sizing the reserve needed to cover warranty claims on a delivered payload fleet.

The inputs for this scenario

  • Flight Units Under Warranty: 12 units (unchanged)
  • Expected Claim Cost per Unit: 45,000 $/unit (unchanged)
  • Forecast Claim Rate: 17 % (raised for this scenario; the documented default is 15)
  • Standing Support Reserve: 20,000 $ (unchanged)

Working through the calculation

  • Applying the documented formula (Total reserve = units under warranty x claim cost per unit x forecast claim rate + standing support reserve) to the inputs above produces each figure below.
  • At this operating point the engine returns 111,800 $ for total warranty reserve cost, the number this scenario is built around.
  • At this operating point the engine returns 9,317 $ / piece for warranty reserve cost per unit.
  • At this operating point the engine returns 91,800 $ for variable warranty reserve cost.
  • At this operating point the engine returns 20,000 $ for fixed warranty reserve adder.

How this compares with the baseline

  • Against the tool's baseline example, where forecast claim rate sits at 15% and the headline result is 101,000 $, this scenario comes in 10.69% above the baseline at 111,800 $.
  • A figure at this level is achievable when forecast claim rate is genuinely sustained, not just peaked for a shift. It uses a single average claim cost and one flat claim rate, so it will not capture infant-mortality clustering, a systemic defect that hits many units at once, or escalating costs late in the warranty term.

Results at a glance

  • Total warranty reserve cost: 111,800 $ (headline result)
  • Warranty reserve cost per unit: 9,317 $ / piece
  • Variable warranty reserve cost: 91,800 $
  • Fixed warranty reserve adder: 20,000 $

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.