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What is Six Sigma ?
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Six Sigma might have different meaning to different companies, but regardless of the way it is used within one organization, Six Sigma means data driven decision making that helps people focus on improving processes to
make them as near perfect as possible.
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Six Sigma is originally developed by Motorola USA end of 80’ties. As of 2010, it enjoys widespread application in many sectors of industry.
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Six Sigma seeks to improve the quality of process outputs by identifying and removing the causes of defects (errors) and minimizing variability in manufacturing or business processes. It uses a set of quality management methods, including statistical methods, and creates a special infrastructure of people within the organization ("Black Belts", "Green Belts", etc.) who are experts in these methods. Each Six Sigma project carried out within an organization follows a defined sequence of steps and has quantified targets.
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A six-sigma process is one in which 99.99966% of the products manufactured are free of defects, compared to a one-sigma process in which only 31% are free of defects.
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The Six Sigma Method - DMAIC
Most people are familiar with the methodological expression of Six Sigma, DMAIC - Define, Measure, Analyze, Improve and Control. Some companies add a R for "recognize" in front of Define and an R for "realize" after Control. You first have to Recognize you have a problem before defining it and, after implementing a solution you have to control it over time to Realize its financial benefits.
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While Six Sigma follows the DMAIC methodology at the project level, it follows a well established deployment methodology at the business level. Companies like GE and DuPont have paved the way for making Six Sigma deployable through large networks of Champions, Black Belts, Green Belts, Yellow Belts and Process Owners.
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