Concetti di base https://www.manager.it/default.asp?page=A_6sigma.html&folder=f_pmproj

1. Six Sigma forSix Sigma for
ManagersManagers

2. Contents :Contents :
• What is Six Sigma?What is Six Sigma?
• Why Six Sigma?Why Six Sigma?
• Six Sigma Phases : Define, Measure, Analyze,Six Sigma Phases : Define, Measure, Analyze,
Improve and ControlImprove and Control
• Tools and Key Roles for Six SigmaTools and Key Roles for Six Sigma

3. What is Six Sigma?What is Six Sigma?

4. What is Sigma ?What is Sigma ?
SigmaSigma
A term used in statistics to represent
standard deviation, an indicator of the
degree of variation in a set of a process

5. What is Six Sigma?What is Six Sigma?
SixSix
SigmaSigma
A statistical concept that measures a
process in terms of defects – at the six
sigma level, there 3.4 defects per
million opportunities
A philosophy and a goal : as perfect as
practically possible
A methodology and a symbol of quality

6. Sigma LevelSigma Level
Sigma Level
(Process
Capability)
Defects per Million
Opportunities
2 308,537
3 66,807
4 6,210
5 233
6 3.4

7. Sigma LevelSigma Level
Six Sigma =
99,9997%

8. Sigma LevelSigma Level
• Every hour the postal service
would lose 20,000 pieces of mail
• Every day our drinking water would
be unsafe for almost 15 minutes
• Every week there would be 5,000
surgical operations that go wrong
in some way
• Every month we would be without
electricity for almost seven hours
Why not Four
Sigma or
99.379% ?