Six Sigma (DMAIC)

Six Sigma is a well-structured, data-driven methodology for eliminating defects, waste, or quality control problems of all kinds in manufacturing, service delivery, management, and other business activities. Six Sigma methodology is based on the combination of well-established statistical quality control techniques, simple and advanced data analysis methods, and the systematic training of all personnel at every level in the organization involved in the activity or process targeted by Six Sigma.

Six Sigma methodology and management strategies provide an overall framework for organizing company wide quality control efforts. These methods have recently become very popular, due to numerous success stories from major US-based as well as international corporations. For reviews of Six Sigma strategies, refer to Harry and Schroeder (2000), or Pyzdek (2001).

In STATISTICA, the submenu commands that are displayed after selecting Six Sigma (DMAIC) Shortcuts from the Statistics - Industrial Statistics & Six Sigma menu provide shortcuts to the modules and specific analytic facilities in those modules that are commonly part of Six Sigma management strategies. These are organized into the categories of activities that make up the Six Sigma effort: Define (D), Measure (M), Analyze (A), Improve (I), Control (C); or DMAIC for short.

Define. The Define phase is concerned with the definition of project goals and boundaries, and the identification of issues that need to be addressed to achieve the higher sigma level.

Measure. The goal of the Measure phase is to gather information about the current situation, to obtain baseline data on current process performance, and to identify problem areas.

Analyze. The goal of the Analyze phase is to identify the root cause(s) of quality problems and to confirm those causes using the appropriate data analysis tools.

Improve. The goal of the Improve phase is to implement solutions that address the problems (root causes) identified during the previous (Analyze) phase.

Control. The goal of the Control phase is to evaluate and monitor the results of the previous phase (Improve).

See also, Six Sigma Process and "Six Sigma" Methodology and STATISTICA.