Aftermarket, Field Service & Service Parts worked example

Installed Base Coverage at 58% target installed-base coverage: a worked example

Suppose target installed-base coverage falls to 58%. This page works the full calculation at that level so you can see exactly which result moves and by how much. Calculate the share of installed equipment covered by active service contracts, dealer support, or planned maintenance programs.

The inputs for this scenario

  • Covered installed units (under contract or warranty): 3,850 units (held at the documented default)
  • Active installed base in the field: 5,200 units (held at the documented default)
  • Target installed-base coverage: 58 % (the input this scenario stresses; the baseline uses 80)

Working through the calculation

  • The calculation starts from the formula this tool documents: Installed base coverage = covered installed units ÷ active installed base × 100.
  • Installed base coverage works out to 74.04 % coverage at these inputs, and this is the headline figure for the scenario.
  • Coverage gap to target works out to -16.04 percentage points at these inputs.
  • Covered installed units works out to 3,850 units at these inputs.
  • Active installed base works out to 5,200 units at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where target installed-base coverage sits at 80% and the headline result is 74.04 % coverage, this scenario lands almost exactly on the baseline at 74.04 % coverage.
  • It computes the percentage of your active installed base that currently sits under a service or warranty agreement, plus how many percentage points you are from your coverage target. When the numbers land here, the stressed input is the lever to work; the walkthrough above shows exactly how much each output recovers as it climbs back toward the baseline.

Results at a glance

  • Installed base coverage: 74.04 % coverage (headline result)
  • Coverage gap to target: -16.04 percentage points
  • Covered installed units: 3,850 units
  • Active installed base: 5,200 units

Run it with your numbers

  • To rerun this with your own numbers, open the live Installed Base Coverage calculator, set target installed-base coverage to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.