Bulk Solids, Mining, Aggregates & Material Processing worked example

Screen Efficiency at 65% screen availability: a worked example in bulk solids, mining, aggregates & material processing

Suppose screen availability falls to 65%. This page works the full calculation at that level so you can see exactly which result moves and by how much. Estimate screen efficiency for screen efficiency for bulk solids, mining, aggregates, and material processing using plant-floor material, production, quality, capacity, or cost inputs.

The inputs for this scenario

  • Tons screened per deck cycle: 18 tons / cycle (held at the documented default)
  • Screening cycles available in the period: 240 cycles (held at the documented default)
  • Screen availability (uptime): 65 % (the input this scenario stresses; the baseline uses 90)
  • First-pass sizing yield (correctly sized fraction): 96 % (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Gross screen efficiency = screen efficiency output per cycle × available screen efficiency cycles.
  • Screen Efficiency works out to 2,696 tons at these inputs, and this is the headline figure for the scenario.
  • Gross screen efficiency works out to 4,320 tons at these inputs.
  • Screen Efficiency uptime loss works out to 1,512 tons at these inputs.
  • Screen Efficiency yield loss works out to 112 tons at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where screen availability sits at 90% and the headline result is 3,732 tons, this scenario comes in 27.78% below the baseline at 2,696 tons.
  • It computes net correctly sized tons by multiplying deck output per cycle and available cycles, then derating that gross figure by screen availability and first-pass sizing yield. 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

  • Screen Efficiency: 2,696 tons (headline result)
  • Gross screen efficiency: 4,320 tons
  • Screen Efficiency uptime loss: 1,512 tons
  • Screen Efficiency yield loss: 112 tons

Run it with your numbers

  • To rerun this with your own numbers, open the live Screen Efficiency calculator, set screen availability to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.