Tunnel Boring & Heavy Civil Equipment worked example

Field Commissioning Hours at 7.2% setup, handling, and delay allowance: a worked example

Suppose setup, handling, and delay allowance falls to 7.2%. This page works the full calculation at that level so you can see exactly which result moves and by how much. Estimate field commissioning hours for tunnel boring and heavy civil equipment using production-ready inputs so teams can plan labor hours, schedule the work, or check whether the job fits the available shift time.

The inputs for this scenario

  • Field commissioning tasks or test points: 120 units (held at the documented default)
  • Commissioning completion rate: 12 units / min (held at the documented default)
  • Setup, handling, and delay allowance: 7.2 % (the input this scenario stresses; the baseline uses 10)

Working through the calculation

  • The calculation starts from the formula this tool documents: Base field commissioning hours time = field commissioning hours workload รท field commissioning hours completion rate.
  • Required field commissioning hours time works out to 10.72 hr at these inputs, and this is the headline figure for the scenario.
  • Base field commissioning hours time works out to 10 hr at these inputs.
  • Field commissioning hours allowance applied works out to 7.2 % at these inputs.
  • Field commissioning hours completion rate works out to 12 pieces / min at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where setup, handling, and delay allowance sits at 10% and the headline result is 11 hr, this scenario comes in 2.55% below the baseline at 10.72 hr.
  • It divides the commissioning workload by the completion rate to get a base time, then inflates it by the setup and delay allowance to get the required time. 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

  • Required field commissioning hours time: 10.72 hr (headline result)
  • Base field commissioning hours time: 10 hr
  • Field commissioning hours allowance applied: 7.2 %
  • Field commissioning hours completion rate: 12 pieces / min

Run it with your numbers

  • To rerun this with your own numbers, open the live Field Commissioning Hours calculator, set setup, handling, and delay allowance to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.