The Overall Equipment Effectiveness (OEE) is the most important metric for measuring total equipment effectiveness in production. It combines the three critical factors Availability, Performance, and Quality into a single, meaningful percentage.
With our OEE calculator, you can quickly and precisely assess your equipment efficiency, identify improvement opportunities, and calculate the ROI of optimization measures.
Calculate your Overall Equipment Effectiveness with hard & soft basis + ROI analysis
Availability = (Available Time ÷ Planned Production Time) × 100
Measures the portion of time when the equipment is actually producing (without unplanned downtime).
Performance = (Produced Parts ÷ Theoretically Possible Parts) × 100
Compares actual with maximum possible production speed.
Quality = (Good Parts ÷ Produced Parts) × 100
Proportion of error-free produced parts (First-Pass-Yield without rework).
Hard Basis: All downtime (planned + unplanned) reduces OEE - stricter evaluation.
Soft Basis: Only unplanned downtime reduces OEE - planned downtime is considered unavoidable.
≥ 85%: World-class performance
75-85%: Very good performance
65-75%: Average range
< 65%: Needs improvement
For continuous improvement, daily or shift-based calculation is recommended. Modern MES systems like SYMESTIC calculate OEE automatically in real-time.
Automate your OEE calculation with the leading cloud-native MES solution. Real-time dashboards, automatic data collection, and AI-based optimization recommendations.