six sigma what is six sigma?
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Six Sigma What is Six Sigma?. Six Sigma is a results-oriented, project focused approach to quality. Six Sigma is a way of measuring and setting targets for reductions in product or service defects that is directly connected to customer requirements. Six Sigma Targets. - PowerPoint PPT PresentationTRANSCRIPT
Six SigmaWhat is Six Sigma?
• Six Sigma is a results-oriented, project focused approach to quality.
• Six Sigma is a way of measuring and setting targets for reductions in product or service defects that is directly connected to customer requirements.
Six Sigma Targets
Sigma Defects per Million
1 690,000
2 308,733
3 66,803
4 6,210
5 233
6 3.4
The Six Sigma Process
• Decision by senior management to engage in the Six Sigma process
• Executive Seminar
• Selecting the “Champions”
• Special course for the “Champions”
• Process improvement teams
Black Belt Training
• Four or five weeks • Each week of training is separated by three
or four weeks during which teams apply the methods to the problem
• New methods are introduced during each week
• Black Belts present their work to the instructors and other Black Belts candidates
Five Steps Approach (DMAIC)
• Define: problem statement (Y= f(X)), mission statement for the project, critical to quality (CTQ) parameters, quality function deployment (QFD)
• Measure: measurement system analysis for variables and attributes, cost of poor quality, process capability analysis
• Analysis: root causes of the variation for Y, review of probability and statistics, non-normal distributions, estimation, hypothesis testing, regression and correlation
• Improve: find the optimum level for X using various methods, e.g. experimental design
• Control: having optimal levels for the X’s, the input factors and optimal Y establish the control