OEE Calculator
Calculate Overall Equipment Effectiveness in seconds — availability, performance and quality combined into one score. Free, instant and fully in your browser.
OEE
77.1%
OEE = Availability × Performance × Quality
World-class OEE is around 85%; most plants run at 55–65%. Use OEE to find which loss — availability, performance or quality — to attack first.
What is OEE?
Overall Equipment Effectiveness (OEE) measures how much of your planned production time is truly productive. It multiplies three factors: Availability (uptime vs planned time), Performance (actual vs ideal speed) and Quality (good units vs total). An OEE of 100% means only good parts, as fast as possible, with no stops. It is the single number that exposes hidden capacity.
How to calculate OEE
- 1
Availability
Subtract downtime from planned production time to get run time, then divide run time by planned time.
- 2
Performance
Multiply ideal cycle time by units produced, then divide by run time. This shows speed losses and micro-stops.
- 3
Quality
Divide good units by total units. Multiply Availability × Performance × Quality for your OEE.
Frequently asked questions
What is a good OEE score?
World-class OEE is generally about 85% (roughly 90% availability × 95% performance × 99.9% quality). Most manufacturers operate between 55% and 65%, so there is usually significant room to improve.
Why is my measured OEE higher than reality?
Manual OEE tends to run high because micro-stops, short slowdowns and optimistic ideal cycle times are easy to miss. Objective, video-based measurement (as in Yamazo Studio) closes that gap.
Does Yamazo Studio calculate OEE automatically?
Yamazo Studio is a video time-study and work-analysis tool, not a real-time OEE monitor. It feeds OEE improvement by exposing the root causes of availability, performance and quality losses through frame-accurate analysis.
Related lean tools & guides
OEE shows the gap — Yamazo closes it
A score tells you where you stand. Yamazo Studio turns shop-floor video into the time studies, changeover (SMED) and balancing analysis that attack the losses behind a low OEE — one offline Lean Operating Desk.
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