OEE (Overall Equipment Effectiveness) = Availability × Performance × Quality. Measures how effectively manufacturing equipment is used. 100% = perfect production. 85% = world-class. 60% = typical. Each component identifies losses: downtime (Availability), speed loss (Performance), defects (Quality). ISO 22400-2 standard. The Six Big Losses framework pinpoints improvement opportunities. TeepTrak measures OEE across 450+ factories in 30 countries.
OEE (Overall Equipment Effectiveness) is the gold-standard KPI for measuring manufacturing equipment productivity. It answers one question: of the total time your equipment could be producing good parts at maximum speed, what percentage is it actually achieving? An OEE of 100% means every part is produced at maximum speed with zero defects and zero downtime. In practice, world-class OEE is 85%, and most manufacturers start at 40-65% when they first measure.
The OEE formula
OEE = Availability × Performance × Quality
| Component | Formula | What it measures | World-class |
|---|---|---|---|
| Availability | Run Time / Planned Production Time | % of planned time the machine is actually running (accounts for breakdowns + changeovers) | 90%+ |
| Performance | (Ideal Cycle Time × Total Count) / Run Time | % of maximum speed achieved during run time (accounts for minor stops + reduced speed) | 95%+ |
| Quality | Good Count / Total Count | % of produced units that meet quality standards (accounts for startup rejects + production rejects) | 99%+ |
Example: Availability 87% × Performance 93% × Quality 98% = OEE 79.2% — above average but below world-class.
The Six Big Losses
OEE’s power comes from the Six Big Losses framework (TPM methodology) that categorizes every production loss:
| OEE component | Loss | Description | Example |
|---|---|---|---|
| Availability | 1. Equipment failure | Unplanned stops (breakdowns) | Motor failure, tool break |
| 2. Setup & adjustment | Changeover, cleaning, startup | Product change, mold change | |
| Performance | 3. Idling & minor stops | Brief stops (<5 min), jams | Sensor trip, material jam |
| 4. Reduced speed | Running below ideal cycle time | Worn tooling, operator caution | |
| Quality | 5. Process defects | Rejects during stable production | Out-of-spec parts, scrap |
| 6. Startup losses | Rejects during startup/changeover | First articles, trial runs |
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OEE benchmarks: what is a “good” OEE?
| OEE Score | Rating | Context |
|---|---|---|
| 100% | Perfect | Theoretical maximum — never achieved in practice |
| 85%+ | World-class | Target for mature OEE programs (3-5 years) |
| 75-84% | Good | Above average, active improvement culture |
| 60-74% | Average | Typical for manufacturers with some improvement programs |
| 40-59% | Below average | Common starting point — significant improvement opportunity |
| <40% | Low | Major losses present — quick wins available |
Industry-specific benchmarks: automotive 85%, food & beverage 80%, pharma 75-80%, electronics 85-90%. Always compare within your industry.
How OEE software measures automatically
Modern OEE platforms like TeepTrak Pulse automate the entire OEE calculation:
- Availability: edge sensor (TeepTrak Box) detects machine running/stopped in real-time — no manual logging. Operators categorize stop reasons via touchscreen.
- Performance: actual cycle time measured automatically per part/cycle. Compared against ideal cycle time configured per product. Minor stops and speed losses captured without operator intervention.
- Quality: operators log reject counts (or automatic vision inspection feeds data). First-pass yield calculated per run.
- OEE calculated in real-time: displayed on andon screens, operator tablets, supervisor dashboards, and executive multi-site views. ISO 22400-2 standardized methodology across all machines and sites.
TeepTrak measures OEE across 450+ factories in 30 countries. Proven benchmarks: Hutchinson +33 OEE points (42%→75%) across 40 sites, Nutriset +18 points (62%→80%) in 4 weeks.
FAQ: What is OEE
What is OEE and how is it calculated?
OEE = Availability × Performance × Quality. Measures equipment effectiveness as a percentage (0-100%). World-class = 85%. Calculated automatically by OEE software like TeepTrak Pulse using edge sensors and operator input. ISO 22400-2 standard defines the methodology.
What is a good OEE score?
60% is typical starting point. 75% is above average. 85% is world-class. Compare within your industry: automotive targets 85%, pharma 75-80%. Hutchinson achieved 75% OEE across 40 sites (from 42% baseline). Most manufacturers start measuring at 40-65%.
Conclusion
OEE (Availability × Performance × Quality) is the most important manufacturing KPI — measuring how effectively you use your equipment. World-class is 85%. The Six Big Losses framework turns OEE from a number into an improvement roadmap. TeepTrak Pulse automates OEE measurement across 450+ factories with edge sensors, real-time dashboards, and ISO 22400-2 standardized methodology.
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