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 Custoemrs, using minimum resources. It is based on the concept of 'Continuous Improvement'.
Six Sigma, 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.
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.
Six Sigma has multiple levels of expertise as below: