It was thought that the Six Sigma concept was simply "too powerful to fail," a misconception on which the whole misfortune of the Six Sigma programs is based. The human factor is often not taken into consideration. Elements such as empowerment, communication and recognition play an important role in determining the success of the Six Sigma methodology, according to the result of the study.

Implementation in sectors like finance and sales were unsuccessful, due to the very nature of the concept, which was developed and is still mainly applied in manufacturing organizations (especially mass-manufacturing). The very basis of Six Sigma, the defect measure approach was simply ineffective in other areas of the economy. The opinion which rises from the literature review above coincides with the result of the study conducted by McAdam and Lafferty: outside a mass manufacturing environment, the Six Sigma methodology is unsuccessful.

The data gathered from this...
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