Bulk Solids, Mining, Aggregates & Material Processing worked example

Feeder Rate at 68% target feeder rate accuracy: a worked example in bulk solids, mining, aggregates & material processing

Suppose target feeder rate accuracy falls to 68%. This page works the full calculation at that level so you can see exactly which result moves and by how much. Estimate feeder rate for feeder rate for bulk solids, mining, aggregates, and material processing using plant-floor material, production, quality, capacity, or cost inputs.

The inputs for this scenario

  • Material delivered at the commanded set rate: 850 tons (held at the documented default)
  • Total material fed in the same period: 1,000 tons (held at the documented default)
  • Target feeder rate accuracy: 68 % (the input this scenario stresses; the baseline uses 95)

Working through the calculation

  • The calculation starts from the formula this tool documents: Feeder Rate = feeder rate accepted or affected material ÷ total ore, aggregate, powder, sand, gravel, fines, or bulk solid in same period × 100.
  • Feeder Rate works out to 85 % at these inputs, and this is the headline figure for the scenario.
  • Feeder Rate gap to target works out to -17 points at these inputs.
  • Feeder Rate accepted or affected material works out to 850 count at these inputs.
  • Total ore, aggregate, powder, sand, gravel, fines, or bulk solid in same period works out to 1,000 count at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where target feeder rate accuracy sits at 95% and the headline result is 85 %, this scenario lands almost exactly on the baseline at 85 %.
  • It computes the percentage of total fed tonnage that was delivered at the commanded set rate, plus the point gap to your rate-accuracy 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

  • Feeder Rate: 85 % (headline result)
  • Feeder Rate gap to target: -17 points
  • Feeder Rate accepted or affected material: 850 count
  • Total ore, aggregate, powder, sand, gravel, fines, or bulk solid in same period: 1,000 count

Run it with your numbers

  • To rerun this with your own numbers, open the live Feeder Rate calculator, set target feeder rate accuracy to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.