What is 6sigma, pls explain briefly
The term SIGMA (Greek letter ) is used in Statistics as a measure of variation. Lower the value, lower is the variation or higher is the consistency.
z =( X- Meu) / sigma
In Six Sigma methodology, the sigma level (actually sigma score or Z - value ) is a benchmark metric and it indicates how often defects are likely to occur.
Where x is a given limiting value, may be lower specification limit (LSL) or upper specification limit (USL), is the population mean and is the population standard deviation.
When measuring the performance of a company, its Sigma level is given. Traditionally operated businesses will usually be found running at a 3 or 4 Sigma performance level, even though their rate of problems per opportunity usually falls between 6,200 and 67,000 per one million.
On the other hand, an organization running at 6 Sigma will instead see an average of only 3.4 problems per million opportunities. This tremendous difference is can make the difference between success and failure in a market where the expectations of customers rise as quickly as the complexity of todays products and processes.
Surprisingly enough ...more