Desalination & Membrane Water Treatment Equipment worked example

Field Service Reserve at 92% service reserve probability included: a worked example in desalination & membrane water treatment equipment

Push service reserve probability included up to 92% and the picture changes. This example computes every intermediate figure at that operating point. Use it when field service 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 service events covered: 100 events (unchanged)
  • Expected service cost per event: 45 $ / event (unchanged)
  • Service reserve probability included: 92 % (raised for this scenario; the documented default is 80)
  • Fixed travel or mobilization reserve: 250 $ (unchanged)

Working through the calculation

  • Applying the documented formula (Expected variable field service reserve = systems or service events covered × expected service cost per event × service reserve probability included) to the inputs above produces each figure below.
  • At this operating point the engine returns 4,390 $ for total field service reserve, the number this scenario is built around.
  • At this operating point the engine returns 43.9 $ / piece for field service reserve per covered event.
  • At this operating point the engine returns 4,140 $ for expected variable field service reserve.
  • At this operating point the engine returns 250 $ for fixed travel or mobilization reserve.

How this compares with the baseline

  • Against the tool's baseline example, where service reserve probability included sits at 80% and the headline result is 3,850 $, this scenario comes in 14.03% above the baseline at 4,390 $.
  • It multiplies covered service events by the expected per-event cost and a claim probability to get the variable reserve, then adds a fixed travel or mobilization reserve for the total. 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 field service reserve: 4,390 $ (headline result)
  • Field service reserve per covered event: 43.9 $ / piece
  • Expected variable field service reserve: 4,140 $
  • Fixed travel or mobilization reserve: 250 $

Run it with your numbers

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

Last reviewed 2026-05-12.