OEE & Factory Performance worked example

Planned Downtime Ratio at 11% target planned downtime ratio: a worked example

Suppose target planned downtime ratio falls to 11%. This page works the full calculation at that level so you can see exactly which result moves and by how much. Calculate planned downtime ratio for OEE & Factory Performance: planned downtime as a share of total scheduled time.

The inputs for this scenario

  • Planned downtime minutes: 60 min (held at the documented default)
  • Total scheduled production minutes: 480 min (held at the documented default)
  • Target planned downtime ratio: 11 % (the input this scenario stresses; the baseline uses 15)

Working through the calculation

  • The calculation starts from the formula this tool documents: Planned downtime ratio = planned downtime ÷ total scheduled time × 100.
  • Planned downtime ratio works out to 12.5 % at these inputs, and this is the headline figure for the scenario.
  • Gap to target works out to -1.5 points at these inputs.
  • Planned downtime works out to 60 count at these inputs.
  • Total scheduled time works out to 480 count at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where target planned downtime ratio sits at 15% and the headline result is 12.5 %, this scenario lands almost exactly on the baseline at 12.5 %.
  • It divides planned downtime by total scheduled time and multiplies by 100, then reports the gap between that ratio and your target. 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

  • Planned downtime ratio: 12.5 % (headline result)
  • Gap to target: -1.5 points
  • Planned downtime: 60 count
  • Total scheduled time: 480 count

Run it with your numbers

  • To rerun this with your own numbers, open the live Planned Downtime Ratio calculator, set target planned downtime ratio to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.