Transcript Six Sigma What is Six Sigma?

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
Sigma
1
2
3
4
5
6
Defects per Million
690,000
308,733
66,803
6,210
233
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