Bulk Solids, Mining, Aggregates & Material Processing worked example

Screen Efficiency at 99% screen availability: a worked example in bulk solids, mining, aggregates & material processing

This scenario runs the screen efficiency calculation on the strong side: 99% screen availability, with every other input held at its documented default. a plant team is reviewing screen efficiency for bulk solids, mining, aggregates, and material processing and needs a clear screen efficiency for production, quality, capacity, maintenance, purchasing, or costing decisions

The inputs for this scenario

  • Tons screened per deck cycle: 18 tons / cycle (unchanged)
  • Screening cycles available in the period: 240 cycles (unchanged)
  • Screen availability (uptime): 99 % (raised for this scenario; the documented default is 90)
  • First-pass sizing yield (correctly sized fraction): 96 % (unchanged)

Working through the calculation

  • Applying the documented formula (Gross screen efficiency = screen efficiency output per cycle × available screen efficiency cycles) to the inputs above produces each figure below.
  • At this operating point the engine returns 4,106 tons for screen efficiency, the number this scenario is built around.
  • At this operating point the engine returns 4,320 tons for gross screen efficiency.
  • At this operating point the engine returns 43.2 tons for screen efficiency uptime loss.
  • At this operating point the engine returns 171 tons for screen efficiency yield loss.

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 10% above the baseline at 4,106 tons.
  • Use it when sizing a screening line, validating a supplier's deck rating, or troubleshooting why a quarry circuit misses its graded-product target. Treat this as a target state: the delta against the baseline quantifies what the improvement is worth before you commit to chasing it.

Results at a glance

  • Screen Efficiency: 4,106 tons (headline result)
  • Gross screen efficiency: 4,320 tons
  • Screen Efficiency uptime loss: 43.2 tons
  • Screen Efficiency yield loss: 171 tons

Run it with your numbers

  • Every input above is editable in the live Screen Efficiency calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.