Aftermarket, Field Service & Service Parts worked example

Installed Base Growth Rate at 9.2% target installed-base growth: a worked example

Push target installed-base growth up to 9.2% and the picture changes. This example computes every intermediate figure at that operating point. an aftermarket sales or service planning team needs to measure growth in active equipment under support

The inputs for this scenario

  • Net added active units: 540 units (unchanged)
  • Starting installed base: 7,200 units (unchanged)
  • Target installed-base growth: 9.2 % (raised for this scenario; the documented default is 8)

Working through the calculation

  • Applying the documented formula (Installed base growth rate = net added active units ÷ starting installed base × 100) to the inputs above produces each figure below.
  • At this operating point the engine returns 7.5 % growth for installed base growth rate, the number this scenario is built around.
  • At this operating point the engine returns 1.7 percentage points for growth gap to target.
  • At this operating point the engine returns 540 units for net added active units.
  • At this operating point the engine returns 7,200 units for starting installed base.

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.
  • It computes the period growth rate of the active installed base from net added units over the starting base, and the gap to your target. 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

  • Installed base growth rate: 7.5 % growth (headline result)
  • Growth gap to target: 1.7 percentage points
  • Net added active units: 540 units
  • Starting installed base: 7,200 units

Run it with your numbers

  • Every input above is editable in the live Installed Base Growth Rate calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.