What is Lean Six Sigma?
The term 'Lean Six Sigma' is made up of two concepts as- Lean and Six Sigma.
Lean is a technique to enhance Values for the Customer by removing Waste. Value is anything for which the customer is willing to pay for and Waste is anything which is not adding any Value for the customers.
There are 5 Lean Principles through which 7 different types of Wastes are removed to maximise the Values for the Customers, using minimum resources. It is based on the concept of 'Continuous Improvement'.
Six Sigma is a disciplined & data-driven methodology that eliminates defects from any process, products or service, delivering 99.9996% efficiency & accuracy.
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.
The the term- Six Sigma, 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.