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Six Sigma as a powerful business strategy has been well recognised as an imperative for achieving and
sustaining operational and service excellence. Six sigma has made a huge impact on industry but still the
academic community lags behind in its understanding of this powerful strategy. In other words, six sigma
lacks a theoretical understanding and hence it is our responsibility as academicians to bridge the gap
between the theory and practice of six sigma. Six sigma methodology utilises the tools and techniques for
fixing problems in business processes in a sequential and disciplined fashion. Each tool and technique
within the six sigma methodology has a role to play and when, where, why and how these tools or
techniques should be applied is the difference between success and failure of a six sigma project. Six
sigma utilises the concept of statistical thinking and encourages the application of well-proven statistical
tools and techniques for defect reduction through process variability reduction methods.
Key words-Six Sigma, DPMO, DMAIC Methodology, DMADV Methodology, Process Management.