Since its inception at Motorola in the 1980s, and the objective was to reduce the number of defects to as low as 3.4 parts per million opportunities. Six Sigma is being adopted by many different organizations. The effectiveness of Six Sigma is well supported by subjective evidence. However, academic research on Six Sigma is still not matured. In this context, choice means adapting the correct decisions, choosing the best alternatives and timely optimization of your choices as the organizational environment changes. The AHP has proven to be extremely valuables six sigma and other business process improvement prioritization decisions when they involve both tangible and intangible strategic considerations. This paper first reviewed the current literature on Six Sigma, and then performed a critical analysis of Six Sigma. It is also presented the concept analytic hierarchy process (AHP) with using six sigma models for the project selection.
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