Port, Crane & Terminal Equipment worked example

Maintenance Interval at 12% setup, access, and lockout delay allowance: a worked example in port, crane & terminal equipment

Push setup, access, and lockout delay allowance up to 12% and the picture changes. This example computes every intermediate figure at that operating point. Use it when maintenance interval in port, crane and terminal equipment needs a defensible run time before a quote goes out.

The inputs for this scenario

  • Inspection and service tasks per maintenance cycle: 120 units (unchanged)
  • Technician task completion rate: 12 units / min (unchanged)
  • Setup, access, and lockout delay allowance: 12 % (raised for this scenario; the documented default is 10)

Working through the calculation

  • Applying the documented formula (Base maintenance interval time = maintenance interval workload รท maintenance interval completion rate) to the inputs above produces each figure below.
  • At this operating point the engine returns 11.2 hr for required maintenance interval time, the number this scenario is built around.
  • At this operating point the engine returns 10 hr for base maintenance interval time.
  • At this operating point the engine returns 12 % for maintenance interval allowance applied.
  • At this operating point the engine returns 12 pieces / min for maintenance interval completion rate.

How this compares with the baseline

  • Against the tool's baseline example, where setup, access, and lockout delay allowance sits at 10% and the headline result is 11 hr, this scenario comes in 1.82% above the baseline at 11.2 hr.
  • It computes the base service time from task count and completion rate, then inflates it by the delay allowance to give the required maintenance window. 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

  • Required maintenance interval time: 11.2 hr (headline result)
  • Base maintenance interval time: 10 hr
  • Maintenance interval allowance applied: 12 %
  • Maintenance interval completion rate: 12 pieces / min

Run it with your numbers

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

Last reviewed 2026-05-12.