OEE (Overall Equipment Effectiveness)
A manufacturing reliability score that combines availability, performance, and quality into one percentage.
Definition
OEE (Overall Equipment Effectiveness) is the percentage of planned production time that is truly productive. It is calculated as Availability × Performance × Quality and is the de-facto reliability KPI on the plant floor.
The OEE formula
OEE = Availability × Performance × Quality.
- Availability = run time ÷ planned production time
- Performance = (ideal cycle time × total count) ÷ run time
- Quality = good count ÷ total count
100% is theoretical perfection. World-class is around 85% (90% availability × 95% performance × 99.9% quality). Most operations start in the 40–60% range before improvement work.
Why OEE matters
OEE turns three different loss categories — stops, slow-downs, defects — into one comparable score. Maintenance teams influence availability (via MTBF/MTTR) and sometimes performance (via condition-based intervention). Quality loss usually flags process issues rather than maintenance ones.
How FacilityLane tracks OEE
FacilityLane captures downtime reasons on every reactive work order, runtime via meters, and ties them to assets. OEE can then be computed per asset or line and trended alongside MTTR and MTBF. LAYLA can answer "which lines have falling OEE this quarter?" directly.
Related terms
FAQ
Common questions about OEE (Overall Equipment Effectiveness).
Both. Availability is heavily influenced by maintenance (unplanned downtime, PM compliance). Performance and quality are more production-driven. OEE is useful precisely because it crosses the boundary.
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