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OEE Calculator

Overall Equipment Effectiveness — full loss breakdown

Time & Production Inputs

Minutes unless noted. Calculated values are greyed-out and auto-filled.

Total scheduled production window
Machine was actually running
Used to derive MTBF & MTTR
Standard time per part at rated speed

OEE Metrics

Overall Equipment Effectiveness
76.8
%
World-class OEE is ≥85%
OEE = A × P × Q
Availability
87.5
%
Runtime ÷ Planned Production Time
Performance
90.6
%
(Ideal Cycle × Pieces) ÷ Runtime
Quality
99.0
%
Good Pieces ÷ Total Pieces
MTBF (Mean Time Between Failures)
—
min / breakdown
Uptime ÷ Breakdown Count
MTTR (Mean Time To Repair)
—
min / breakdown
Downtime ÷ Breakdown Count

Loss Breakdown — Six Big Losses

All losses are derived from the inputs above and expressed as a percentage of Planned Production Time.

Availability Losses
Unplanned Downtime (Breakdowns) —
Planned Downtime (Maintenance) —
Total Availability Loss —
Performance Losses
Minor Stops & Idling —
Speed Loss (Reduced Rate) —
Total Performance Loss —
Quality Losses
Startup Defects —
Production Rejects —
Total Quality Loss —

Loss Visualisation

Longest bar = 100 %. Each individual loss is shown relative to the largest loss. Total loss shown as ■ red segment.

World-class
Needs improvement
Unplanned Downtime —
Planned Downtime —
Minor Stops & Idling —
Speed Loss —
Startup Defects —
Production Rejects —
Total Loss (1 − OEE) —
0 % 100 %

Formula Reference

OEE= Availability × Performance × Quality
Availability= Actual Runtime ÷ Planned Production Time
Performance= (Ideal Cycle Time × Total Pieces) ÷ Actual Runtime
Quality= Good Pieces ÷ Total Pieces
MTBF= Uptime ÷ Number of Breakdowns
MTTR= Downtime ÷ Number of Breakdowns
A-Loss (BD)= (Unplanned Downtime ÷ PPT) × 100 %
A-Loss (PM)= (Planned Downtime ÷ PPT) × 100 %
P-Loss (MS)= (Minor Stop Time ÷ Runtime) × 100 %
P-Loss (Spd)= (Speed Loss Time ÷ Runtime) × 100 %
Q-Loss (SD)= (Startup Defects ÷ Total Pieces) × 100 %
Q-Loss (PR)= (Rejects ÷ Total Pieces) × 100 %
Current Calculation
Enter values above to see the full calculation…
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Values update instantly as you type or drag sliders.