Six Sigma and Lean is being used in every industry right from software development to multinational companies. As far as the history of Six Sigma is concerned it was developed in the year 1900. Officially this product was launched in 1980s to reduce variability. Lean deals with data, philosophy and also removes the waste that creates a good environment. The secrets that link consumers’ satisfaction to company’s strategy are:
• Customer’s value
• Achieving goals of the company
• Increasing productivity through motivation of the company

    
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https://blog.edx.org/six-sigma-lean-3-secrets-success?track=blog