Answer:
Six Sigma
Step-by-step explanation:
Six sigma is a disciplined, statistics-based, data-driven approach introduced by Bill Smith, an American Engineer. It is model for improving the elimination of defects in products or services or processes. to ensure ease of production, quality of production as well as reduce costs of production as well.
The word 'sigma' is a statistical term that shows the measure of deviation in a set of data, plus or minus 6 standard deviation around a central tendency of a set of data.
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