Oee Performance
OEE Performance is the Performance component of Overall Equipment Effectiveness (OEE), quantifying how efficiently equipment runs at its ideal speed during actual runtime. It is calculated as (Ideal Cycle Time × Total Count) / Run Time, expressed as a percentage, and measures speed losses like slow cycles and minor stops.
On the shop floor, OEE Performance is used in CMMS systems like ServiceGrid to track speed losses, such as slow cycles and minor stops, identifying when machines run below designed capacity. This enables targeted improvements in operational efficiency by addressing issues like incorrect ideal cycle times or unreported reduced speeds, ultimately enhancing overall equipment effectiveness.
- Ignoring minor stops: Small interruptions (e.g., 2–5 second pauses) are not logged, artificially inflating Run Time and deflating true Performance.
- Using incorrect Ideal Cycle Time: Setting the standard rate based on outdated data or optimistic targets rather than verified engineering specs leads to skewed Performance scores.
- Running at reduced speed: Operators intentionally slow machines to avoid wear or jams, but this reduced speed is not captured as a loss, masking significant Performance degradation.
How does OEE Performance differ from Availability?
Availability measures downtime losses (e.g., failures, setups), while Performance measures speed losses while running (e.g., slow cycles, minor stops); both are multiplied to get OEE.
What is the Industry 60/40/20 rule for OEE components?
A world-class OEE of 85% is often broken down as ~90% Availability, ~95% Performance, and ~99% Quality, highlighting that Performance losses are typically the second-biggest contributor to inefficiency.
Can Performance exceed 100%?
Mathematically, yes (if actual cycle time is faster than ideal), but this usually indicates an incorrectly set Ideal Cycle Time rather than true over-performance, and should be investigated.