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AshToolbox Quality Lean Six Sigma Suite
Foundational Category: Lean & Continuous Flow • ~6 min read Shared Enterprise Tool

Overall Equipment Effectiveness (OEE) & TEEP

Isolate production losses and identify machine bottleneck downtime drivers.

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Q:

How is Overall Equipment Effectiveness (OEE) calculated in Lean Six Sigma?

OEE measures manufacturing productivity by multiplying: OEE = Availability × Performance × Quality. World-Class manufacturing targets 85% or higher.

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Production Inputs

min
min
min/part
Overall Equipment Effectiveness
79.2%
Benchmark: Typical
TEEP (Total Plant)
79.2%
24/7 Asset Utilization
Availability (A)
90.2%
Uptime Ratio
Performance (P)
92.4%
Speed Ratio
Quality (Q)
95.0%
Yield Ratio

Loss Time Decomposition

Unplanned Breakdowns & Setups (Availability)47 min (9.8%)
Speed Losses & Minor Stops (Performance)33 min (6.9%)
Scrap & Rework Losses (Quality)20 min (4.2%)

The Three OEE Factors & Six Big Losses

Overall Equipment Effectiveness (OEE) provides the benchmark metric for Lean TPM (Total Productive Maintenance) and Six Sigma DMAIC projects. It isolates downtime losses into Availability, speed losses into Performance, and scrap/rework into Quality.

Formulas

Availability: Operating Time / Planned Production Time
Performance: (Total Parts Run × Ideal Cycle Time) / Operating Time
Quality: Good Parts / Total Parts Run
OEE: Availability × Performance × Quality
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Engineering Disclaimer: These tools and calculators are intended for engineering analysis, educational study, and operational guidance. They do not constitute formal regulatory certification (such as medical, aerospace flight-critical, or statutory safety filings) without independent audit and sign-off by a certified Quality Engineer or Six Sigma Black Belt. AshToolbox is not affiliated with, sponsored by, or endorsed by AIAG, ISO, ASQ, or any standards body.

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