How do you calculate OEE for a material processing line?

Multiply availability, performance, and quality. Availability is run time over planned time — 410 over 480 minutes gives 85.4%. Multiplying by 95% performance and 98% quality yields an OEE of about 79.5%.

What is a good OEE for crushing and screening operations?

World-class OEE is around 85%, and 60% is a common starting point for many plants. The example's 79.5% is a solid, well-run aggregate or bulk-solids circuit with room to close the remaining availability gap.

Why is my availability only 85% when the plant ran most of the shift?

Availability compares 410 run minutes against 480 planned minutes, so the 70 lost minutes — chute blockages, belt changes, screen panel swaps — cut availability to 85.4% even though the line felt like it ran all shift.

What hurts OEE most in material processing — downtime or speed?

In aggregates and bulk solids it is usually availability. Plugged chutes, liner changes, and conveyor faults steal whole blocks of time, which is why the example's 85.4% availability is the biggest lever, more than the 95% performance or 98% quality.

How is performance measured for a crusher or screen?

Performance is actual throughput divided by rated throughput (tph) over the run time. At 95% the line is running close to its design rate; the 5% gap typically comes from feed variability, choke-feed issues, or minor micro-stops.

OEE vs availability — what's the difference?

Availability is just one of three OEE factors. The line here has 85.4% availability but 79.5% OEE because performance (95%) and quality (98%) each shave off additional output. OEE is the complete picture; availability alone overstates effectiveness.

Bulk Solids, Mining, Aggregates & Material Processing calculator

Material Processing OEE Calculator

Overall Equipment Effectiveness (OEE) for material processing is a single percentage that captures how much of your planned production time a crusher, screen, mill, or bulk-solids line actually converts into good, saleable output. Plant and reliability engineers in mining, aggregates, and bulk-solids processing use it to expose hidden losses across availability, speed, and quality. It matters because processing lines fail in three different ways at once — unplanned downtime, running below rated tph, and out-of-spec product — and OEE rolls all three into one comparable number. Tracking it turns a noisy shift into a clear improvement target.

What this calculator does

Calculate OEE for Bulk Solids, Mining, Aggregates & Material Processing from availability, performance, and quality to see how much of planned production time becomes good output.
Use it to benchmark line effectiveness and target the biggest loss in Bulk Solids, Mining, Aggregates & Material Processing.
It computes OEE for a material-processing line as the product of availability (run time over planned time), performance, and first-pass quality yield.

Formula used

Availability = operating time ÷ planned production time
OEE = Availability × Performance × Quality

Inputs explained

Operating (run) time: Time the equipment was actually producing during the period, after all downtime.
Planned production time: Scheduled production time for the same period, excluding planned non-production stops.
Performance: Actual output ÷ ideal output at rated speed during run time.
Quality (first-pass yield): Good units ÷ total units produced, before any rework.

How to use the result

Use it to baseline and trend a crushing, screening, or grinding circuit and to pinpoint which loss — availability, performance, or quality — is dragging the line down.
OEE measures effectiveness against planned production time, not theoretical maximum; it also hides whether the bottleneck asset is the one you are measuring, so a high cell OEE can still mask a starved or blocked circuit.

Common questions

How do you calculate OEE for a material processing line? Multiply availability, performance, and quality. Availability is run time over planned time — 410 over 480 minutes gives 85.4%. Multiplying by 95% performance and 98% quality yields an OEE of about 79.5%.
What is a good OEE for crushing and screening operations? World-class OEE is around 85%, and 60% is a common starting point for many plants. The example's 79.5% is a solid, well-run aggregate or bulk-solids circuit with room to close the remaining availability gap.
Why is my availability only 85% when the plant ran most of the shift? Availability compares 410 run minutes against 480 planned minutes, so the 70 lost minutes — chute blockages, belt changes, screen panel swaps — cut availability to 85.4% even though the line felt like it ran all shift.
What hurts OEE most in material processing — downtime or speed? In aggregates and bulk solids it is usually availability. Plugged chutes, liner changes, and conveyor faults steal whole blocks of time, which is why the example's 85.4% availability is the biggest lever, more than the 95% performance or 98% quality.
How is performance measured for a crusher or screen? Performance is actual throughput divided by rated throughput (tph) over the run time. At 95% the line is running close to its design rate; the 5% gap typically comes from feed variability, choke-feed issues, or minor micro-stops.

Last reviewed 2026-05-12.