OEE (Overall Equipment Effectiveness) is one of the most important metrics in manufacturing—but many teams struggle to calculate it accurately.
This guide breaks down exactly how to calculate OEE step-by-step.
What is OEE (Overall Equipment Effectiveness)?
OEE (Overall Equipment Effectiveness) measures how effectively equipment is being used by combining:
- Availability
- Performance
- Quality
The formula is:
OEE = Availability × Performance × Quality
Step 1: Calculate Availability
Availability measures how much planned production time is actually used.
Availability = Run Time / Planned Production Time
Example:
- Planned Production Time = 8 hours
- Downtime = 2 hours
- Run Time = 6 hours
Availability = 6 / 8 = 75%
Step 2: Calculate Performance
Performance measures how fast equipment runs compared to its ideal speed.
Performance = (Ideal Cycle Time × Total Units) / Run Time
Example:
- Ideal Cycle Time = 1 minute per unit
- Total Units = 300
- Run Time = 6 hours (360 minutes)
Performance = (1 × 300) / 360 = 83%
Step 3: Calculate Quality
Quality measures how many good units are produced.
Quality = Good Units / Total Units
Example:
- Total Units = 300
- Defective Units = 30
- Good Units = 270
Quality = 270 / 300 = 90%
Final OEE Calculation
OEE = Availability × Performance × Quality
OEE = 75% × 83% × 90%
OEE = 56%
What This Means
An OEE score of 56% indicates significant opportunity for improvement across downtime, speed, and quality.
Most facilities operate between 60%–75%, while world-class performance is 85% or higher.
How to Improve OEE
To improve OEE, manufacturers need:
- Accurate downtime tracking
- Preventive maintenance programs
- Real-time visibility into performance
- Standardized work order processes
How WorkTrek Helps
WorkTrek CMMS helps improve OEE by:
- Tracking downtime in real time
- Automating preventive maintenance
- Providing accurate asset data
- Delivering centralized reporting and dashboards
See Your OEE Opportunity
We offer a FREE proof of concept and a 48-hour OEE gap analysis using your actual data.
Book here:
https://meetings.hubspot.com/alan-finney
WorkTrek CMMS 
Leave a comment