Six Sigma What is Six Sigma?

1
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.

2
Six Sigma Targets

• Sigma Defects per Million
• 1
  690,000
• 2
  308,733
• 3
  66,803
• 4
  6,210
• 5
  233
• 6
  3.4

3
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

4
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

5
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 Xs, the
  input factors and optimal Y establish the control