OEE calculator spreadsheet software for Microsoft Excel to simplify OEE calculation on up to 10 machines. Use for processing manually collected OEE data to provide a benchmark of manufacturing production efficiency. OEE (Overall Equipment Effectiveness) has become a widely used metric in manufacturing industries to measure the effectiveness of production machines. OEE provides a benchmark figure for manufacturing efficiency and allows the tracking of the effects of any improvement initiatives. OEE is the product of the factors of Availability Performance and Quality and is expressed as a percentage.