What is the meaning of “6 sigma” in six sigma quality tool?
Six Sigma is a business management strategy that seeks to improve the quality of process outputs company-wide by identifying and removing the causes of defects (errors) and variability in the manufacturing and business processes. View the Wiki page in the sources below and you will find the section labeled: Origin and meaning of the term “six sigma process” “The term ‘six sigma process’ comes from the notion that if one has six standard deviations between the process mean and the nearest specification limit, as shown in the graphic, there will be practically no items that fail to meet specifications.” There is an image that shows the picture of the statistical graph, and you can see how it plots out – six on each side. Below that, you see a section called “Sigma levels” which shows the “Percent defective” at each level of Sigma. So your average company starts somewhere between -6 and 6, and heads (ideally) toward the positive six end of the scale. Hope this helps!
