Aftermarket, Field Service & Service Parts worked example

Installed Base Growth Rate at 5.76% target installed-base growth: a worked example

This worked example runs the installed base growth rate numbers for a tougher week than the baseline: 5.76% target installed-base growth instead of the typical 8%. Calculate installed-base growth from net added active units, starting installed base, and the growth target.

The inputs for this scenario

  • Net added active units: 540 units (held at the documented default)
  • Starting installed base: 7,200 units (held at the documented default)
  • Target installed-base growth: 5.76 % (the input this scenario stresses; the baseline uses 8)

Working through the calculation

  • The calculation starts from the formula this tool documents: Installed base growth rate = net added active units ÷ starting installed base × 100.
  • Installed base growth rate works out to 7.5 % growth at these inputs, and this is the headline figure for the scenario.
  • Growth gap to target works out to -1.74 percentage points at these inputs.
  • Net added active units works out to 540 units at these inputs.
  • Starting installed base works out to 7,200 units at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where target installed-base growth sits at 8% and the headline result is 7.5 % growth, this scenario lands almost exactly on the baseline at 7.5 % growth.
  • Use it in aftermarket demand planning, service-revenue modeling, or board reviews to track whether the serviceable population is expanding on plan. A result at this level usually justifies acting on the stressed input before touching anything else, because every other figure in the table is downstream of it.

Results at a glance

  • Installed base growth rate: 7.5 % growth (headline result)
  • Growth gap to target: -1.74 percentage points
  • Net added active units: 540 units
  • Starting installed base: 7,200 units

Run it with your numbers

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

Last reviewed 2026-05-12.