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What are the disadvantages of Six Sigma

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Viewing 18 posts - 1 through 18 (of 18 total)
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  • #52906

    BlackCrow
    Participant

    Do you know the disadvantages of Six Sigma? Thank You! :)

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    #186736

    Mike Carnell
    Participant

    Only if you don’t like making decisions based on data.
    Just my opinion.

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    #186737

    Shambhavi
    Member

    Changes and suggested process/product level changes to be implemented thought the floor becomes pain. But convincing the teams across and projecting the improvements financially helps.
    Regards
    Shambhavi

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    #186740

    Isaac
    Participant

    I think its less disadvantages, and more pitfalls or dangers of not getting the right support, or running a project properly.
    Six Sigma projects involve a lot of work, and they also involve promoting change across the board.  This means you need to convince those at the rockface, and those in management above them that it is worthwhile.  They all need to buy in, and support what you are trying to do. 
    Without the correct support a six sigma strategy will fail.  With the right support, the right people, it will flourish and do very well.  There are lots of articles on companies who have got SS to work, and those who havent.
    You could also criticise SS for not bringing anything new in terms of tools, but what it does bring is a methodology of use.  A structured approach, and decisions based on data, rather than hunches and gut feelings.

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    #186745

    Shubhanker
    Member

    From personal experience the biggest problem actually is the Measure phase. Since Six Sigma relies on Measuring processing capability this can take months. So were you to apply lean meanwhile you would actually see greater progress.

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    #186770

    Shelby
    Member

    Another potential hazard is if leadership tries to achieve results via shortcuts to the methodology. 
    Some quick tips to recognize this point of failure.  If you hear leaders saying:
    * I know this belt does a good job……I’ll skip the gate reviews
    * Do we even need to have the reviews?
    * and various other comments that end with leadership declaring that they do not need to be involved.

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    #186771

    Putnam
    Participant

    Both Lean and Six Sigma have issues when the number of lots per year is low.  It’s difficult to demonstratably improve something you don’t do very often.

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    #186783

    Mike Carnell
    Participant

    Mike86,
    That is an interesting comment. Although the idea of SS came out of Comm at Motorola if you look at most of the original consultants that came from Motorola we were at Government Electronics in the Phoenix area. We ran vitually nothing but low volume high product mix.

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    #186784

    Mike Carnell
    Participant

    Those are change management issues that are not indigenous to SS.

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    #186785

    Mike Carnell
    Participant

    Those are Leadership issues that are not indigenous to SS.

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    #186786

    Mike Carnell
    Participant

    Why is Capability taking you months?

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    #186787

    Darth
    Participant

    Hey Carnell, posting lots of responses to the same thread and including duplicate postings won’t get you the award this year. Webby can see right through you. Hope all is good by you.

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    #186790

    Severino
    Participant

    If you take a grass-roots approach (rather than a top-down approach) you can get fired.  Many managers will suffer fools much longer than they will suffer someone who makes them look like a fool.
    If the rollout does not keep pace with the demand organizational friction can result.
     

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    #186795

    Mike Carnell
    Participant

    Darth,
    Just like the Sheriff in Best Little Whorehouse in Texas – “…..I do a little shuffle to the left then I do a little shuffle to the right.” Do you think J9, Jess and Katie will figure it out? I guess I need another plan.
    Just trying to make it to December. Christmas in Mauritius instead of Thailand. Hope things are going well with you.
    Regards

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    #186812

    Craig
    Participant

    Mike,
    I recall alot of hype about one of the few high volume products back in the day….FMU139.
    Did you see any differences in the six sigma rollouts between Comm and Tactical?  Recall that I was sheltered in PWF trying to make good boards for all to use!!! Polyimide, fusion bonded PTFE multilayers….what an interesting job to say the least!
     

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    #186813

    Mikel
    Member

    What nonsense.The disadvantage of low volume is you may have to think.

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    #186816

    Mike Carnell
    Participant

    hacl,
    PWF was fun. The diversity was great and the crew was fun to work with and when the snotty little yuppies from Tactical showed up with their special fuse you were kind enough to take care of them.
    It was that comment from Mike Maxwell that got us into GR&R. We rejacted boards and he refused to rework them until I could prove that the inspection was right.
    FMU-139 & FZU-48! Hype? Two CEO Quality Awards (only program to win it twice at that time) and a Quality Award from the US Navy. It is the program that Mario Perez-Wilson may have used to base his book “Six Sigma” on. Quite a few similarities.
    Those were interesting times.
    Regards

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    #186835

    Jud
    Participant

    “…SEE greater progress if you applied Lean”    How are you seeing that progress?  Gut feel?  Looks better?  Good luck.  Even strictly Lean practioners advocate measurements.
    The Measure phase provides objective feedback on your improvement actions.  If it takes too long to obtain baseline performance data, e.g., low volume mfg, consider metrics other than final product pass/fail.  There must be a number of critical in-process parameters for which you can obtain multiple measurements per end product produced.

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