Waste-to-Energy Equipment worked example

Maintenance Downtime Cost at 36% generating capacity affected: a worked example

This worked example runs the maintenance downtime cost numbers for a tougher week than the baseline: 36% generating capacity affected instead of the typical 50%. Estimates the cost of a waste-to-energy maintenance outage from offline hours, lost generation rate, capacity affected, and fixed turnaround labor and parts.

The inputs for this scenario

  • Forced Outage Hours: 120 hours (held at the documented default)
  • Lost Generation Value Rate: 1,900 $/hr (held at the documented default)
  • Generating Capacity Affected: 36 % (the input this scenario stresses; the baseline uses 50)
  • Turnaround Labor & Parts: 140,000 $ (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Total = outage hours x lost generation rate x (capacity affected รท 100) + turnaround cost.
  • Total maintenance downtime cost works out to 222,080 $ at these inputs, and this is the headline figure for the scenario.
  • Maintenance downtime cost per unit works out to 1,851 $ / piece at these inputs.
  • Variable maintenance downtime cost works out to 82,080 $ at these inputs.
  • Fixed maintenance downtime cost adder works out to 140,000 $ at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where generating capacity affected sits at 50% and the headline result is 254,000 $, this scenario comes in 12.57% below the baseline at 222,080 $.
  • Use it when evaluating a planned versus forced outage, building a maintenance business case, or quantifying the cost of a specific historical trip. A result at this level usually justifies acting on the stressed input before touching anything else, because every other figure in the table is downstream of it.

Results at a glance

  • Total maintenance downtime cost: 222,080 $ (headline result)
  • Maintenance downtime cost per unit: 1,851 $ / piece
  • Variable maintenance downtime cost: 82,080 $
  • Fixed maintenance downtime cost adder: 140,000 $

Run it with your numbers

  • To rerun this with your own numbers, open the live Maintenance Downtime Cost calculator, set generating capacity affected to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.