Tunnel Boring & Heavy Civil Equipment worked example

Assembly Bay Utilization at 98% target utilization: a worked example in tunnel boring & heavy civil equipment

Push target utilization up to 98% and the picture changes. This example computes every intermediate figure at that operating point. Use it to judge whether the assembly bay in Tunnel Boring & Heavy Civil Equipment is a bottleneck or has spare capacity.

The inputs for this scenario

  • Hours the assembly bay was in use: 320 hr (unchanged)
  • Hours the assembly bay was available: 400 hr (unchanged)
  • Target utilization: 98 % (raised for this scenario; the documented default is 85)

Working through the calculation

  • Applying the documented formula (Utilization = hours in use รท hours available) to the inputs above produces each figure below.
  • At this operating point the engine returns 80 % for utilization, the number this scenario is built around.
  • At this operating point the engine returns 18 points for gap to target.
  • At this operating point the engine returns 320 value for used amount.
  • At this operating point the engine returns 400 value for available amount.

How this compares with the baseline

  • Against the tool's baseline example, where target utilization sits at 85% and the headline result is 80 %, this scenario lands almost exactly on the baseline at 80 %.
  • It divides the hours a bay was actively occupied by build work by the total hours it was available, then compares the result 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

  • Utilization: 80 % (headline result)
  • Gap to target: 18 points
  • Used amount: 320 value
  • Available amount: 400 value

Run it with your numbers

  • Every input above is editable in the live Assembly Bay Utilization calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.