What is Six Sigma?
Six Sigma is a management system for process optimization, statistical quality objective and at the same time a methodology in quality management and includes description, measurement, analysis, improvement and monitoring of business processes with statistical means. In 2011, ISO 13053 was published, the first standard for Six Sigma, which describes a kind of toolbox:
- Customer Tools:
Kano model, requirements analysis, House of Qualirty, Taguchi Gen’ichi loss function, customer interviews and questionnaires, conjoint analysis.
- Project tools
Network planning technique, project description, CTQ analysis, tree diagram, cost-benefit analysis, control charts
- Lean tools
Standardization, bottleneck and material flow analysis, value added and waste analysis, supply chain matrix, setup time analysis, red tag analysis, etc.
- Management tools
Decision tree, affinity diagram, relationship diagram, matrix diagram and matrix data analysis
- Design tools
Parameter design, Quality Function Deployment (QFD), TRIZ, FMEA/VMEA, Fault Tree Analysis, Tolerance Analysis
- Graphic tools
Test forms and measurement plan, histogram, Pareto diagram, cause-effect diagram, relation diagram, control charts
- Statistical tools
Statistical Design of Experiments (DoE), Process Capability Analysis, Regression Analysis, Statistical Test Methods (F-Test, ANOVA), Measurement System Analysis (Gage R&R), Probability Network