Heat Treatment, Furnaces & Thermal Processing worked example

Furnace OEE at 68% performance: a worked example

This worked example runs the furnace oee numbers for a tougher week than the baseline: 68% performance instead of the typical 95%. Calculate OEE for Heat Treatment, Furnaces & Thermal Processing from availability, performance, and quality to see how much of planned production time becomes good output.

The inputs for this scenario

  • Operating (run) time: 410 min (held at the documented default)
  • Planned production time: 480 min (held at the documented default)
  • Performance: 68 % (the input this scenario stresses; the baseline uses 95)
  • Quality (first-pass yield): 98 % (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Availability = operating time ÷ planned production time.
  • OEE works out to 56.92 % at these inputs, and this is the headline figure for the scenario.
  • Availability works out to 85.42 % at these inputs.
  • Performance works out to 68 % at these inputs.
  • Quality works out to 98 % at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where performance sits at 95% and the headline result is 79.52 %, this scenario comes in 28.42% below the baseline at 56.92 %.
  • Use it on batch or continuous furnaces — box, pit, pusher, mesh-belt, or vacuum — when you have run time, planned time, and credible performance and quality figures. 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

  • OEE: 56.92 % (headline result)
  • Availability: 85.42 %
  • Performance: 68 %
  • Quality: 98 %

Run it with your numbers

  • To rerun this with your own numbers, open the live Furnace OEE calculator, set performance to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.