Mining Vehicle & Underground Equipment worked example

Downtime Cost at 54% share of capacity genuinely lost: a worked example in mining vehicle & underground equipment

Suppose share of capacity genuinely lost falls to 54%. This page works the full calculation at that level so you can see exactly which result moves and by how much. Estimate the financial impact of mining vehicle downtime, combining forgone production margin with mobilization and repair charges.

The inputs for this scenario

  • Equipment downtime duration: 16 hr (held at the documented default)
  • Lost contribution margin per production hour: 1,800 $/hr (held at the documented default)
  • Share of capacity genuinely lost: 54 % (the input this scenario stresses; the baseline uses 75)
  • Mobilization and repair flat cost: 5,000 $ (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Downtime cost = lost hours x margin per hour x capacity-lost % + mobilization.
  • Total downtime cost works out to 20,552 $ at these inputs, and this is the headline figure for the scenario.
  • Downtime cost per unit works out to 1,285 $ / piece at these inputs.
  • Variable downtime cost works out to 15,552 $ at these inputs.
  • Fixed downtime cost adder works out to 5,000 $ at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where share of capacity genuinely lost sits at 75% and the headline result is 26,600 $, this scenario comes in 22.74% below the baseline at 20,552 $.
  • It computes total downtime cost as lost hours times margin per hour scaled by the share of capacity actually lost, plus a flat mobilization and repair cost. 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

  • Total downtime cost: 20,552 $ (headline result)
  • Downtime cost per unit: 1,285 $ / piece
  • Variable downtime cost: 15,552 $
  • Fixed downtime cost adder: 5,000 $

Run it with your numbers

  • To rerun this with your own numbers, open the live Downtime Cost calculator, set share of capacity genuinely lost to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.