The term “Six Sigma” has two definitions. Firstly, it has a statistical definition. Sigma (the lower-case Greek letter σ) is used to represent the standard deviation (a measure of variation) of a statistical population. The term “Six Sigma” comes from the notion that if one has six standard deviations between the mean of a process and the nearest specification limit, there will be practically no items that fail to meet the specification. Secondly, the term refers to a toolkit of quality tools that are applied within a structured, five-stage improvement methodology known as DMAIC (standing for Define - Measure - Analyze - Improve - Control), designed to drive process improvement towards a Six Sigma level of capability.

BPIR Categories

14.3.1 Create commitment for improvement
14.3.2 Implement an improvement approach/method/technique
14.3.3 Implement an org-wide continuous improvemnt program
14.3.5 Reengineer business processes & systems
15.5.4 Activities to assist in resource preservation
15.6.3 Design of products, services or processes
3.2.6 Review and improve design process
3.4.2 Eliminate outdated products/processes/services
3.6.1 Manage product/process/service development

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