Desalination & Membrane Water Treatment Equipment worked example

Warranty Reserve at 92% expected claim rate over warranty term: a worked example in desalination & membrane water treatment equipment

Push expected claim rate over warranty term up to 92% and the picture changes. This example computes every intermediate figure at that operating point. Use it when warranty reserve in desalination and membrane water treatment equipment is being put through a desalination and membrane water treatment equipment weighted-cost review.

The inputs for this scenario

  • Systems or components under warranty: 100 units (unchanged)
  • Average repair cost per warranty claim: 45 $ / unit (unchanged)
  • Expected claim rate over warranty term: 92 % (raised for this scenario; the documented default is 80)
  • Fixed warranty program overhead: 250 $ (unchanged)

Working through the calculation

  • Applying the documented formula (Expected variable warranty reserve = systems or components under warranty × expected warranty cost per unit × expected warranty occurrence share) to the inputs above produces each figure below.
  • At this operating point the engine returns 4,390 $ for total warranty reserve, the number this scenario is built around.
  • At this operating point the engine returns 43.9 $ / piece for warranty reserve per covered unit.
  • At this operating point the engine returns 4,140 $ for expected variable warranty reserve.
  • At this operating point the engine returns 250 $ for fixed warranty program reserve.

How this compares with the baseline

  • Against the tool's baseline example, where expected claim rate over warranty term sits at 80% and the headline result is 3,850 $, this scenario comes in 14.03% above the baseline at 4,390 $.
  • It multiplies the covered unit count by the average repair cost and the expected claim rate to get the variable reserve, then adds fixed program overhead for a total accrual. 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: 4,390 $ (headline result)
  • Warranty reserve per covered unit: 43.9 $ / piece
  • Expected variable warranty reserve: 4,140 $
  • Fixed warranty program reserve: 250 $

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.