Single-Use Bioprocess Assemblies worked example

Warranty Reserve at 1.73% expected claim rate: a worked example in single-use bioprocess assemblies

Push expected claim rate up to 1.73% and the picture changes. This example computes every intermediate figure at that operating point. A quality and finance team setting the per-lot warranty accrual before releasing a large single-use assembly order.

The inputs for this scenario

  • Assemblies Shipped: 5,000 assemblies (unchanged)
  • Cost per Warranty Claim: 410 $/claim (unchanged)
  • Expected Claim Rate: 1.73 % (raised for this scenario; the documented default is 1.5)
  • Field Investigation Reserve: 3,000 $ (unchanged)

Working through the calculation

  • Applying the documented formula (Warranty reserve = assemblies shipped x cost per claim x expected claim rate + field investigation reserve) to the inputs above produces each figure below.
  • At this operating point the engine returns 38,465 $ for total warranty reserve cost, the number this scenario is built around.
  • At this operating point the engine returns 7.69 $ / piece for warranty reserve cost per unit.
  • At this operating point the engine returns 35,465 $ for variable warranty reserve cost.
  • At this operating point the engine returns 3,000 $ for fixed warranty reserve adder.

How this compares with the baseline

  • Against the tool's baseline example, where expected claim rate sits at 1.5% and the headline result is 33,750 $, this scenario comes in 13.97% above the baseline at 38,465 $.
  • It computes the total and per-assembly warranty reserve by combining the expected number of field claims times the cost per claim with a fixed field investigation reserve. 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

  • Total warranty reserve cost: 38,465 $ (headline result)
  • Warranty reserve cost per unit: 7.69 $ / piece
  • Variable warranty reserve cost: 35,465 $
  • Fixed warranty reserve adder: 3,000 $

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.