Six Sigma is not just a toolbox. It is a way of thinking about business, about processes and about cause-and-effect relationships. To ensure success, the application of Six Sigma relies on traditional scientific methods to examine processes, remove undesirable causes and their effects. Six Sigma also seeks to innovate through the discovery of truth with refined, rational cognitive skills and the objective analysis of empirical data. It is a collection of tools. It is a methodology. It is a thought process that dissects the large picture into smaller parts and reassembles it into a more efficient configuration.
Many of the tools used for Six Sigma also proved useful in conjunction with TQM and other process improvement methodologies. While some of the tools are new to process improvement activities, it is important to note that Six Sigma also provides a new way to use existing tools. This leads to a debate about whether Six Sigma is something new or a new way to employ existing tools!
An article by Robert Tripp, Scot Shank and Mike Carnell, emphasizes on this debate and speaks about DMAIC phases of six sigma methodology. Visit the following link to access the article:
http://www.isixsigma.com/new-to-six-sigma/dmaic/six-sigma-toolbox/