What is Six Sigma
Six Sigma is a disciplined, data-driven approach that eliminates defects from any process- from manufacturing to transactional, from product to service.
In other words, Six Sigma is a Quality Improvement methodology that strives for ‘Perfection’. It is a set of qualitative & quantitative tools & techniques such as control charts, process mapping, statistical process control, SIPOC, etc.
Six Sigma is commonly expressed in metrics form as 3.4 DPMO (Defect Per Million Opportunities). In simple words, it means, Six Sigma delivers only 3.4 defects out of 10,00,000 units or 99.99966% accuracy.
The word- Six Sigma, is made up of two terms- Six and Sigma where Sigma is an unit to measure quality and Six denotes acceptable level of quality.
Six Sigma has two methodologies, best known as- DMAIC and DMADV.
DMAIC stands for Define-Measure-Analyze-Improve-Control and used to improve existing process whereas DMADV stands for Define-Measure-Analyze-Design-Verify which is used for starting a new process.
Six Sigma is currently being used by almost all the prominent companies in India and the world across industries & domains.