iSixSigma

6 Sigma

Viewing 12 posts - 1 through 12 (of 12 total)
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  • #45604

    Anand S C
    Participant

    Hi,
    what is 10 sigma and is it possible ?
    Regards,
    Anand

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    #149439

    Abul
    Participant

    10 Sigma is Perfection, It means no scope of error.Not even 3.14 per billion  oppurtunity.
    Aeroplane Manufacturers follow 10 Sigma.
    Regards
     

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    #149440

    Ropp
    Participant

    I was under the impression the airline industry ran at 7 sigma.
     
     Regards,
     
     Dave

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    #149443

    Six Sigma Shooter
    Member

    I guess it depends on what you’re measuring.  If they are at 7 or 10 sigma, or whatever inflated sigma level you choose to pick, then why are so many air travelers unhappy with the airlines and their services?  If you say they are at 7 or 10 sigma because the plane doesn’t crash, I submit that you are taking a very limited perspective and one that only looks at the basic expected performance.  I think we need to look at more than just one aspect when deciding the sigma level for airlines, like the entire customer service experience from ticketing / booking, through arrival / check-in, service during the flight . . . you get the idea.  Taking all of the experience into account, as a customer, what would you judge the industry’s sigma level to be?  My guess would be 2 to 3 sigma, if that – and that’s on a good day.

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    #149451

    Waste
    Member

    The take off/landing sigma is at about 7 sigma. The timely arrival of luggage is between 2 sigma (United) and 3.5 sigmas (Southwest). The others are in-between. 98% of all luggage that did not arrive on time can be retrieved. Best way to ensure that your luggage arrives with you: Tip the guy who checks in your luggage.

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    #149452

    Six Sigma Shooter
    Member

    Yes – tipping for someone to do their job right is always a good approach.  I always give a tip to the Captain and First Officer and, so far, none of the planes I have flown on have crashed.  Works everytime!  Then again, there just might be some fallacy type thinking here?  Would love to see the data that supports your assumption that tipping equals your bags arriving at the right place and time.

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    #149454

    Waste
    Member

    The tipping is based on a Bayesean approach to probability. The arrival/take-off and timely delivery of baggage statistics are based on a frequency approach to probability. Thus my data are: every trip that I have made over many, many years … So far, so good for me.

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    #149457

    Six Sigma Shooter
    Member

    Following your analysis and data, I should have had luggage lost or delayed due to misrouting and poor handling throughout my multi-,millions of miles of air travel, since I do not use sky caps nor do I tip for baggage handling.  Yet, I have never had a piece of luggage lost or misrouted and only twice delyed in arrival due to connection problems.   Not a bad record for 42 years of air travel.  Maybe there is some post hoc fallacy thinking and luck of the draw taking place here?  Just my two cents worth.

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    #149458

    Waste
    Member

    Take a look at the Ancient Egyptian dices, they may give you an answer to your question.

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    #149478

    Hogg
    Participant

    When will all you numb skulls wake up to the fact that “sigma levels” are meaningless ?
    Estimating counts in the extreme tails of distributions is total nonsense.  Sigma is a measure of dispersion, or spread of data.  Sigma levels are like trying to predict the shape of a dog by counting the hairs on the tip of its tail.

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    #149481

    M G
    Participant

    He’s a bit emotional but he’s right.  All you can say is that there is 1 crash per 500,000,000 flights or whatever.  This has nothing to do with “sigma”.  “Sigma” cannot be estimated from such data.
    “Sigma level” has no meaning. 

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    #149482

    Cruz
    Participant

    Sam/Geoff,
    Phat and Pale are a fine example of everything that’s wrong Six Sigma. Can you imagine having to work with people like this?
    Cruz

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