Operations & Lean Manufacturing Lab

Overall Equipment Effectiveness Lab

Calculate Overall Equipment Effectiveness (OEE), Availability, Performance, and Quality while diagnosing TPM Six Big Losses and lost capacity value.

OEE Model Six Big Losses Table TPM Theory FAQ

Manufacturing Presets

Load calibrated plant operation profiles.

Step 1: Shift Time & Production Counts

Shift Operations Parameters

1. Shift Operating Times (Minutes)

mins
e.g. 8 hours = 480 mins.
mins
Scheduled stop time.
mins
Mechanical / electrical stops.
mins
Tooling & job changeovers.

2. Speed & Quality Output

sec/unit
Nameplate design speed.
units
Good + scrap produced.
units
Non-conforming rejects.
$
Contribution value per good item.
Overall OEE
0.0%
Typical (60-75%)
Availability (Uptime)
0.0%
Performance (Speed)
0.0%
Quality (Yield)
0.0%
Good Net Production
0 Good
Annual Lost Capacity
$0

Step 2: TPM Six Big Losses Breakdown

Where Production Time is Lost

Quantifies how equipment downtime, speed degradation, and quality defects subtract from theoretical maximum production capacity.

OEE Pillar & Loss Category TPM Loss Description Lost Operating Time Pillar Efficiency

Lean Manufacturing Guide

Understanding OEE in operations

Overall Equipment Effectiveness (OEE) is the universal benchmark used in Lean, Six Sigma, and Total Productive Maintenance (TPM).

  • The 3-Pillar Multiplier: High uptime (90%) and high yield (95%) can still yield poor OEE if the line runs at 60% speed ($0.90 imes 0.60 imes 0.95 = 51.3%$).
  • Hidden Factory: Idling, minor stops, and micro-delays often cause more lost capacity than catastrophic mechanical failures.
  • CapEx Avoidance: Improving OEE from 60% to 80% creates 33% more capacity without spending millions on new factory lines.

Test defect prevention in the Cost of Quality Lab.

Operations Equations

Essential OEE formulas

OEE = Availability Rate × Performance Rate × Quality Rate

Availability = Operating Time ÷ Planned Production Time

Performance = (Ideal Cycle Time × Total Units) ÷ Operating Time

Quality = Good Units Produced ÷ Total Units Produced

Lost Opportunity ($) = (Theoretical Max − Good Units) × Unit Margin

Model inventory batch sizes in the Inventory EOQ Lab.

FAQ

OEE and lean manufacturing questions

What is Overall Equipment Effectiveness (OEE) and why is it used?

OEE is the gold-standard metric for measuring manufacturing and operational productivity. It multiplies Availability (uptime), Performance (speed), and Quality (good output) to reveal truly productive production time.

What is considered a World-Class OEE benchmark?

World-Class OEE is generally considered to be 85% or higher (representing 90% Availability, 95% Performance, and 99.9% Quality). Typical manufacturing operations achieve 60% to 75%.

What are the Six Big Losses in TPM?

The Six Big Losses are: 1) Equipment Breakdowns, 2) Setup and Changeover, 3) Idling and Minor Stops, 4) Reduced Operating Speed, 5) Process Defects and Scrap, and 6) Startup Yield Losses.

How does OEE connect to cost of quality and profitability?

Low OEE wastes machine capacity, requires expensive overtime, creates inventory shortages, and generates scrap costs. Improving OEE converts fixed overhead into billable output without buying new equipment.

Can I export OEE shift reports to CSV?

Yes. You can export complete shift times, availability, performance, quality percentages, Six Big Losses minutes, and lost capacity values as a UTF-8 CSV spreadsheet with formula injection defense or print an executive brief.

Is this tool certified industrial engineering consulting or ISO compliance auditing?

No. This tool provides simplified educational operations models for manufacturing and business education without formal engineering certification, machine safety sign-off, or ISO 9001 compliance audit.

Continue Exploring Operations Tools

Explore our Operations Simulation Hub, optimize defect costs in the Cost of Quality Lab, balance lot sizes in the Inventory EOQ Lab, or model staffing limits in the Staffing Capacity Simulator.