Six Sigma to many companies is a measure of quality with a continuous improvement program looking for perfection. Six Sigma is a disciplined, data-driven approach and methodology for eliminating defects. (driving towards six standard deviations between the mean and the nearest specification limit).
The statistical representation of Six Sigma shows how well a process is performing. To achieve Six Sigma quality, a process must produce no more than 3.4 defects per million opportunities (99.9997 %) . An "opportunity" is defined as a chance for non-conformance, or not meeting the required specifications. This means we need to be nearly flawless in executing our key processes
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