The indicator that reveals the true efficiency of your plant
February 26, 2026
OEE - Overall Equipment Effectiveness
Measuring Overall Equipment Effectiveness Considering Availability, Performance and Quality
See how OEE is calculated:
AVAILABILITY (A) - Actual Production Time How much time is actually dedicated to production.
PERFORMANCE (B) - Total Availability Time How long the machine could produce.
QUALITY (C) - Actual Production The quantity actually produced.
Formula:
OEE = (C ÷ D) × (Producing Time vs. Downtime) × (Defect-Free Products ÷ Total Produced)
Big Production Losses
OEE is calculated capturing the three dimensions of loss:
1. Availability Period
- Quality industries
- Obsolescence
- Equipment
2. Loss of Performance
- Reduced speed
- Equipment
3. Loss of Quality
- Quality Losses
- Rework in Production
Understanding Cycle Time
Cycle Time: Average time needed to produce a unit, identifying production bottlenecks.
Example: Your machine makes a part every 2 minutes.
Production Lead Time: Total time from order issuance to completion.
Example: Order arrives on Monday, leaves on Wednesday. Lead time = 2 days.
What to do with this information?
An OEE below expectations is not a sentence. It is an invitation to investigate. Large production losses (downtime, slow setup, poor quality) reveal exactly where your operation needs to improve.
When you know your real OEE, you know the untapped potential of your factory. This metric is essential for management and continuous improvement.
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