OEE calculations

Automation World - July 2009

Overall equipment effectiveness (OEE) is a percentage calculation determined by three major components—availability, performance (or run time) and quality. The goal of OEE is to enhance a plant’s ability to get the very most of out existing equipment by making it more productive.

Here’s the process for calculating OEE:

Availability—this is the total time equipment actually runs divided by the total possible time the equipment could run.

Total run time = 7 hours
Total time in shift = 8 hours = 0.875 x 100 = 87.5%

Performance—this is the total time equipment was in cycle producing divided by the total time scheduled to run.

Total time in cycle = 6.2 hours
Total scheduled runtime = 7 hours = 0.886 x 100 = 88.6%

Quality—this is the ratio of good parts produced divided by the total parts produced.

Good parts produced = 900
Total parts produced = 1000 = 0.90 x 100 = 90.0%

To calculate OEE, take the three percentages and multiply them together, then divide by 10,000.

87.5 x 88.6 x 90.0
10,000 = 69.77%

Figures provided by ICONICS, Inc

ICONICS Background Information

Founded in 1986, ICONICS is an award winning leader in the development of Web-enabled industrial automation and manufacturing intelligence software for Microsoft® Windows® operating systems. Our solutions are certified for Windows 7, Windows Server 2008 and Windows Vista. ICONICS has successfully deployed more than 250,000 solutions in over 60 countries worldwide. Its solutions meet diverse customer needs in a variety of industries including Automotive, Building Management, Food & Beverage, Oil/Gas/Petrochemical, Machine Builders, Pharmaceutical/Biotech, Security, Water/Wastewater, Utilities, Government Infrastructures and more.

ICONICS’ corporate headquarters is located in Foxborough, Massachusetts (USA) near Boston. The company has offices throughout the United States, as well as in Australia, China, France, India, Italy, Germany, Netherlands and United Kingdom. ICONICS also has a joint software development and sales office in the Czech Republic.

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