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Dear , I read the opinion of the community members over differences between two methodologies. I would like to elucidate the basic difference that exist between Lean and Six Sigma approach. Six Sixgma as a methodology is more of a Management tool just like we use 360 Degree appraisal . It focuses on reducing variation and can be useful in Quality improvement, Increasing market share . In Six Sigma Project we basically focus on problem where we do not know the root causes and solutions as well. After getting to know the problem , we collect data , Analyse , Brainstrom and find the root causes and reach to the solution till its implementation and control of Results as well. We primarily use high end six sigma tools like Annova, Hypothesis Testing, MSA but which depends on size of project and requirement as well i.e we need not to use ANNOVA in yellow belt Project if complexity is low and financial benefit is quite less. Contrarlily , in Lean Approach we try to eliminate the waste and smoothen the processes by eliminating unnessary steps which are NVA (Non Value Added) and we are already aware about the steps which will not contribute to the vlaue addition . It is more of JUST DO IT APPROACH that we follow because we know the solution . To summarise , Lean and Six Sigma differs in the solutioning aspect . Lean - Soltution is know beforehand and we just need to execute it properly whereas in Six Sigma solution is derived from Data , measurement and application of Statisctical tools . Please respond with you opinion . Thanks and Regards, Rahul Dwivedi

Lean is focussed towards waste elimination, 5"S", Improved process flow of prodcut, JIT system, Zero Inventory, Continuous flow of product. While Sixsigma consist of more complex tools to improve process, Reduce variation in the product. Now there is new concept called Lean Six Sigma, where sixsigma methodology and lean practices both are used to improve process, reduce cost, Improved customer satisfaction etc.

both lean & six sigma works towards continuous improvements and process stability. Lean strategy focus on waste elimination. and Sixsigma focuses on to reduce Variation. Accordingly : lean we have tools such as 5S ( Related to work space ) , Kaizen System ,fool proofing ,cellular manufacturing system. SixSigma : we have FMEA,Fishbone diagram ,5 why ,etc. Some of the tools are used common in both SIxSigma and Lean depending on the requirement (for eg FMEA , Brainstorming , 5 Why Analysis is used for Problem solving).