OEE (Overall Equipment Effectiveness)
OEE measures the effectiveness of equipment during planned production time. It is calculated as the product of availability, performance and quality:
- Availability: the ratio of the actual operating time of the device to the planned operating time.
- Performance: the ratio of actual production speed to expected speed.
- Quality: the ratio of the number of defect-free products to the total number of units produced.
In practice, an OEE of over 85%, achieved by leading companies, is considered a high standard. This value indicates efficient use of production equipment with minimal losses.
OOE (Overall Operations Effectiveness)
OOE extends the concept of OEE by also taking into account planned downtime, such as preventive maintenance or planned repairs. Availability is therefore calculated as the ratio of the actual operating time of the equipment to the total planned operating time, including planned downtime. The calculation of performance and quality remains the same as for OEE.
- Availability: actual uptime of the device / expected uptime of the device, including unplanned downtime during which the device may operate.
- Performance: actual production rate / expected production rate.
- Quality: number of defect-free products / total number of units produced.
TEEP (Total Effective Equipment Performance)
TEEP provides the most comprehensive view of equipment efficiency by considering the entire calendar time (24 hours a day, 7 days a week, 365 days a year). Availability in this case is calculated as the ratio of the actual equipment operating time to the total calendar time. Performance and quality are calculated in the same way as for OEE and OOE.
- Availability: actual device uptime / total device uptime.
- Performance: actual production rate / expected production rate.
- Quality: number of defect-free products / total number of units produced.
The main difference between these indicators lies in the definition of availability:
- OEE: takes into account availability during planned production time.
- OOE: takes into account availability during the total planned operating time, including planned downtime.
- TEEP: takes into account availability throughout the calendar year.
These indicators will help your business identify areas for improving production efficiency and better plan the use of your resources.
