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Criticism of Six Sigma

Six Sigma – iSixSigma Forums Old Forums General Criticism of Six Sigma

Viewing 15 posts - 101 through 115 (of 115 total)
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  • #188326

    Rao
    Participant

    Mike, Of course, there are M-A-I “adaptive loop” and C “supervision loop”; I agree they are closed. But nowhere exists a “control loop”, that loop is OPEN.

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    #188327

    Mike Carnell
    Participant

    To quote Stan “nonsense.” C closes the loop but suppose that depends on who trained you.
    How about the other question?

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    #188328

    Rao
    Participant

    To avoid ambiguity (or nonsense -;), Use the term “actuation-loop”” instead of “control-loop”. I repeat that anyway there is no regulator and “actuation-loop” is open.Solemnly, I declare that the absence of regulator/”actuation loop” is a downside of SS methodology.

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    #188329

    Mike Carnell
    Participant

    You can repeat it as many times as you want you are wrong.

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    #188330

    Rao
    Participant

    Mike,Two for you : “adaptive-loop” + “supervision-loop”.One for me : NO “actuation-loop”.Man, you toughen up and you win!L/Gents, ‘ll be back.

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    #188331

    wgmiller
    Member

    I can think of many examples of products that are one-off and have mostly subjective acceptance criteria.  In fact, just about anything that involves a lot of creativity falls into this category.
    Examples include:

    Custom architecture
    Design of anything where appearance is a prime criteria (e.g.; couture clothing or a customized car interior)
    Fine arts
    All of these are cases where the product is normally one of a kind and the success or failure of the product is mostly subjective, indeed differenct people will have different perceptions of whether the product met its acceptance criteria.  Moreover, what was successful in a previous similar product may not be successful in the product being prepared.  The one-off product being prepared will give you one subjective data point, with no guarantee that data point can be applied to other one-off products.  Accordingly, applying Six Sigma methodology to meeting these subjective requirements is pretty much doomed to failure because you cannot legitimately generate the data required to back up success/failure claims.  It’s all a matter of “taste”.
    Mind you, all of these products have some acceptance criteria that can be objectively measured.  A building must meet Code requirements for fire exits and such, clothing (usually) needs to cover defined naughty bits, a car will have to hold a specified payload, and a commssioned fine arts project (e.g.; a statue) may have to meet dimensional restraints.  Here you can use Six Sigma methodology, because you can objectively demonstrate if something does or does not meet a specific objective requirement, and make corrections as required.  Moreover, this information can be transferred to the next product with the same objective requirement.
    I trust this explains my position.

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    #188332

    Mike Carnell
    Participant

    wgmiller,
    You missed the point. Your statement was that SS required volume and it does not. Maybe you can find an exception but that is the old “wood floats therefore everything that floats is wood” mentality. I am willing to bet that the basic architectural process is the same for custom architecture as it is for most other buldings and the process for a custom interior isn’t one off regardless of the interior.
    I would say what is generally considered fine art has constraints that stay the same i.e. you have edges to a canvass so the process is generally limited to getting the art onto the canvass. Some of the more modern stuff may be different.
    You are still focused on product not process. You are still picking fly crap out of the pepper. You find what may be an exception and you generalize it to the rest of the world? Doesn’t work.
    We don’t even want to get into generalizing the creativity thing. That is nonsense as well.
    Just my opinion.

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    #188340

    MBBinWI
    Participant

    Project hopper and champion should provide the closed loop aspect.  You have a prioritized waiting list of next projects.  As capacity if freed up by project completion, new prioritized project is provided to the BB by the Champion.   Project scope and timeline is finalized between belt and champion then project status is managed.  What’s not closed?

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    #188341

    MBBinWI
    Participant

    doggone it Mr. Carnell, you beat me to the punch.  Well said.
    In case you’re still reading wg, although a specific building may be entirely unique, the doorframes are not, and the CAD station where the drawings are created has commands that are used hundreds, maybe thousands of times for that one building design.  And, more generally, the process by which the building is conceived, cost projected, timeline projected, financed, materials procured, etc., etc., ad nauseum are all process steps that are repetitive.  It is the standardization and quality enhancement of the process steps that leads to overall quality improvements and savings.

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    #188350

    Mike Carnell
    Participant

    SOS. Can’t differentiate between the product and the process and then people wonder why SS fails. It doesn’t fail if you know how to use it, it will work. It is like shooting a weapon. It helps to know which end the bullet is going to come out.
    It is simply Deming’s System of Profound Knowledge – particularly the first point.
    Imagine the cost of custom architecture if you have to develop a whole new method of designing a building every time you do a job.
    Just my opinion.

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    #188362

    Praveen Gupta
    Participant

    You must not criticise Six Sigma. We all know it stupid rubbish but we all make lots of money out of it.

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    #188364

    Mikel
    Member

    Praveen,Long time. Still conjuring sigma levels?

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    #188379

    Mike Carnell
    Participant

    Stan,
    I don’t think much of Praveen’s Hoodo and Voodo Six Sigma stuff but there is no way he would post this.
    Regards

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    #188396

    SiggySig
    Member

    informal poll – how many posters on this thread have active project hoppers and engaged champions?just curious – not the case in my current environment…

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    #188409

    Mike Carnell
    Participant

    So what are you doing to fix your current deployment?

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