Aftermarket, Field Service & Service Parts worked example

Technician Capacity Gap at 55% technician utilization available for calls: a worked example

Suppose technician utilization available for calls falls to 55%. This page works the full calculation at that level so you can see exactly which result moves and by how much. Estimate usable technician service capacity from calls per technician shift, available shifts, utilization, and first-time completion yield.

The inputs for this scenario

  • Service calls per technician shift: 3.2 calls/shift (held at the documented default)
  • Available technician shifts: 520 shifts (held at the documented default)
  • Technician utilization available for calls: 55 % (the input this scenario stresses; the baseline uses 76)
  • First-time completion yield: 86 % (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Gross technician call capacity = calls per shift × available technician shifts.
  • Usable technician call capacity works out to 787 service calls at these inputs, and this is the headline figure for the scenario.
  • Gross technician call capacity works out to 1,664 service calls at these inputs.
  • Capacity lost to non-call time works out to 749 service calls at these inputs.
  • Capacity lost to repeat visits works out to 128 service calls at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where technician utilization available for calls sits at 76% and the headline result is 1,088 service calls, this scenario comes in 27.63% below the baseline at 787 service calls.
  • It multiplies calls per shift by available shifts for gross capacity, then derates by utilization and first-time completion yield to get usable call capacity. 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

  • Usable technician call capacity: 787 service calls (headline result)
  • Gross technician call capacity: 1,664 service calls
  • Capacity lost to non-call time: 749 service calls
  • Capacity lost to repeat visits: 128 service calls

Run it with your numbers

  • To rerun this with your own numbers, open the live Technician Capacity Gap calculator, set technician utilization available for calls to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.