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Overall Equipment Effectiveness (OEE)

Measures the overall efficiency of equipment by considering availability, performance, and quality.

Overall Equipment Effectiveness Calculator

[availability * performance * quality]


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Interpreting Overall Equipment Effectiveness (OEE)

OEE is expressed as a percentage, with higher values indicating better performance. A score of 100% means the equipment is operating at its maximum potential, while lower scores suggest room for improvement.

factors affecting

Factors Affecting Overall Equipment Effectiveness (OEE)

Several factors impact OEE scores:

  • Equipment Reliability: The reliability of machinery and equipment significantly affects OEE. Frequent breakdowns and maintenance can reduce availability and overall OEE.
  • Downtime: Unplanned downtime, setup and changeover times, and other non-productive periods reduce availability and have a negative impact on OEE.
  • Efficiency: Performance measures how efficiently the equipment operates. Factors like speed loss, minor stoppages, and suboptimal operating speeds can lower performance scores. 
  • Quality Control: The number of defects, rework, and scrap products impact the quality component of OEE.
  • Operator Skills: Operator expertise and training play a role in maximizing OEE. Skilled operators can address issues promptly and optimize equipment performance.
  • Maintenance Practices: Effective preventive and predictive maintenance practices can minimize unplanned downtime and improve equipment reliability.

OEE Goals

Overall Equipment Effectiveness (OEE) scores vary significantly across different industries and sectors. OEE is influenced by various factors, including the type of equipment, production processes, industry standards, and specific operational practices. Here's a general overview of OEE scores for a few industries:


Approximate OEE Score Range (%)


85% - 95%


50% - 70%

Food and Beverage

50% - 85%


75% - 90%


40% - 70%


50% - 80%

Electronics Manufacturing

70% - 90%

Mining and Heavy Equipment

40% - 70%


How to make the most of the OEE Calculator:

  • Collect data on equipment performance, downtime, and production output. This involves recording start and stop times accurately.
  • Exclude planned downtime, such as scheduled maintenance, setup, and changeover times, from your calculations. OEE focuses on unplanned downtime and production losses.
  • Maintain consistency in units of measurement for time, such as minutes or hours, to ensure uniformity in data collection.
  • Determine how frequently you'll aggregate data (e.g., hourly, daily, or monthly) to calculate OEE and stick to a consistent time frame.
  • Establish standard cycle times for each operation or product. Deviations from these standards can impact performance calculations.
  • Define the scope of your OEE analysis, whether it's focused on specific machines, production lines, shifts, or the entire facility. Be consistent in your scope across calculations.
  • Use reports in your CMMS to view the OEE data visually using charts or dashboards.