Operating equipment efficiency or effectiveness (OEE) is the percentage of time that equipment, when running or required for production, is producing good-quality products at an acceptable rate. It is the product of three ratios: availability, performance and quality. OEE equals machine availability as a percentage of scheduled uptime x quality yield percentage of all products for a given line x percentage of optimal production rate at which equipment operates. The average OEE among IW Best Plants winners and finalists over the past five years is 74.1.
| Current operating equipment efficiency (OEE) for major product lines: | ||||
| Year | Median | Average | Minimum | Maximum |
| 2007 | 90.0 | 76.6 | 26.4 | 98.8 |
| 2008 | 73.5 | 67.9 | x | 94.8 |
| 2009 | 76.3 | 76.5 | 49.2 | 98.8 |
| 2010 | 77.6 | 74.1 | 42.0 | 90.0 |
| 2011 | 81.8 | 80.3 | 45.0 | 97.7 |
| 2007-2011 | 78.9 | 74.1 | 26.4 | 98.8 |
Source: 2011 IW Best Plants Statistical Profile
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