8 min read · Interactive · TaktClock Learning Center
OEE (Overall Equipment Effectiveness) is the standard metric for measuring manufacturing productivity. It combines three factors — availability, performance, and quality — into a single percentage that reflects how effectively a machine or production line is being used.
Formula: OEE = Availability × Performance × Quality World-class OEE = 85%+. Most facilities average 60-65%.
The Three OEE Factors — Interactive
📈 OEE Calculator — adjust each factor
90%
Uptime / Planned time
85%
Actual vs ideal speed
98%
Good units / Total units
OEE Score
74.9%
Below world-class (85%)
The Six Big Losses
Loss Category
OEE Factor Affected
Example
Equipment Failures
Availability
Unplanned machine breakdown mid-shift
Setup & Adjustments
Availability
Changeover time between product runs
Minor Stoppages
Performance
Machine jams requiring operator reset
Reduced Speed
Performance
Running below rated throughput
Startup Defects
Quality
Scrap during warm-up / first article
Production Defects
Quality
Rework and scrap during steady-state run
📊
TaktClock and OEE: The Performance component of OEE is directly supported by TaktClock's takt time tracking. Every over-takt session represents a performance loss. The Downtime tab captures availability losses by category. Together they give you the data for two of the three OEE factors automatically.
❓ Knowledge Check
A facility runs 8 hours planned, but a breakdown takes 45 minutes. Performance is 88% and quality is 97%. What is the OEE?
✓ Correct! Availability = (480 - 45) / 480 = 90.6%. OEE = 0.906 × 0.88 × 0.97 = 77.4%. The breakdown alone cost nearly 10 OEE points before accounting for performance and quality losses.
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