Number of deaths for 3.8 and six sigma process.
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 This topic has 3 replies, 4 voices, and was last updated 10 years, 9 months ago by Noel.

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February 9, 2005 at 9:32 am #38360
Can anybody help me.
1.What is number of deaths in a 3.8 sigma process and what is the number of deaths in 6 sigma process
2.What is the number of plane crash in a year for 3.8 sigma process and what is for 6 sigma process.
0February 9, 2005 at 7:41 pm #114678Well, the chart I has says…
3.8sigma = 10,724 defects per million
6 sigma = 3.4 defects per million
defects being either deaths or plane crashes…..
I guess Six Sigma is really good, unless you’re one of the 3.4 ;)0February 9, 2005 at 8:46 pm #114680The 6 sigma logic won’t apply to your scenario unless you know that the deaths are distributed normally (or atleast close). Usually such discrete events resemble more of a Poisson distribution (or other discrete distributions).
If you have the right tools, you could build a neural network model (or a regression model) of your death/plane crash and predict your outcome.
Thaly0February 24, 2010 at 10:08 am #189626Just incase anybody is still looking for this info…
3.8 Sigma 98.93%
6 Sigma 99.99966%20,000 lost mails every hour
7 mails lost every hourUnsafe drinking water for almost 15 minutes each day
One unsafe minute every seven months5000 incorrect surgical operations every week
1.7 incorrect surgical operations every weekTwo short or long landings at most major airports each day
One short or long landing every 5 years200,000 wrong drug prescriptions every year
68 wrong drug prescriptions every yearNo electricity for almost 7 hours each month
One hour without electricity every 34 years0 
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