According to Eckes (2001), Six Sigm

According to Eckes (2001), Six Sigma is the most popular quality improvement
methodology in history. Antony (2006) considers it as a business strategy known as an
imperative for operations and business excellence. Its structured framework for
controlling processes and measuring results with a financial aspect and with the use of
quantitative techniques and tools has drawn the attention from academics and
practitioners. In many cases its business performance achievements are remarkable.