Municipal Waste Sorting Equipment worked example

Maintenance Downtime at 14% lock-out, clean-down, and delay allowance: a worked example

This worked example runs the maintenance downtime numbers for a tougher week than the baseline: 14% lock-out, clean-down, and delay allowance instead of the typical 20%. Estimate the planned downtime minutes needed for a PM or repair window on the sort line, including realistic setup and delay allowance.

The inputs for this scenario

  • PM tasks in the window: 24 tasks (held at the documented default)
  • Technician completion rate: 0.2 tasks / min (held at the documented default)
  • Lock-out, clean-down, and delay allowance: 14 % (the input this scenario stresses; the baseline uses 20)

Working through the calculation

  • The calculation starts from the formula this tool documents: Base downtime time = PM tasks / technician completion rate.
  • Required maintenance downtime works out to 137 min at these inputs, and this is the headline figure for the scenario.
  • Base maintenance downtime works out to 120 min at these inputs.
  • Lock-out and delay allowance applied works out to 14 % at these inputs.
  • Technician completion rate works out to 0.2 pieces / min at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where lock-out, clean-down, and delay allowance sits at 20% and the headline result is 144 min, this scenario comes in 5% below the baseline at 137 min.
  • Use it when scheduling a planned outage window, sizing a weekend PM, or quoting how long the line will be down for a given task list. 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

  • Required maintenance downtime: 137 min (headline result)
  • Base maintenance downtime: 120 min
  • Lock-out and delay allowance applied: 14 %
  • Technician completion rate: 0.2 pieces / min

Run it with your numbers

  • To rerun this with your own numbers, open the live Maintenance Downtime calculator, set lock-out, clean-down, and delay allowance to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.