iSixSigma

Tony Hayward

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  • #184310

    Tony Hayward
    Member

    Forrest – Many thanks for the link to your artical which I’ve just read and found very informative. I, like many others I guess, fell into the trap of thinking that there is only one way to calculate standard deviation. Clearly I need a deaper understanding of the underpinning statistics when attempting to evaluate process capability and performance. I shall use your artical for some lengthy discussions with my colleagues so we can help educate each other – Tony

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    #184204

    Tony Hayward
    Member

    Can somebody please answer the bit about Pp and Ppk since I think this gets into longer term process performance and process shift. I have continued arguments about this with colleagues since all mechanical processes wear out. Therefore if processes are left to themselves they will get progressively worse (not just by the classic 1.5 sigma). We do of course intervene with control charts and planned maintenance etc that if done correctly can prevent unacceptable process shift over the life of the process / product – so process shift may actually be a lot less than 1.5 sigma. It comes back to the point that a 6 sigma process gives only 2 defects per billion and a 4.5 sigma process gives the classic 3.4 defects per million. Comments on this will be welcome and useful to me – Tony

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    #182765

    Tony Hayward
    Member

    Hi Maureen
    Finding a suitable Six Sigma project can be very difficult. In principle “Order Picking Accuracy (or errors) should be a good one, but make sure that it is something that customers (internal and / or external) are complaining about and as a result the business is feeling some pain. Also make sure that the project is aligned to the business strategy – it’s not a useful utilization of resource to work on something today that by the time root causes have been found, it is being phased out of the business.
    Don’t jump in too quickly. Collect some initial data, sufficient to clearly define your problem. This may relate to issues with certain customers, various components or different picking areas if you have more than one etc.
    Use the initial data to scope your project, use any relevant tools (such as Pareto Analyse to scope down) to complete the Define phase and end up with your Project Charter with a very clear problem statement giving the current situation from current data collection methods.
    Move into the measure Phase with a clear understanding of the problem you are trying to solve, where you need quality data and implement data collections plans. If systems are not in place for the collection of good quality data on an ongoing basis, you may be able to plug the gap initially with a good temporary data collection methods, although if the situation is complex consideration should be given to a separate Design For Six Sigma project to get the right processes implemented. This might become the first project that should be done. Don’t be surprised if you have to re-visit your Define Phase if your data suggests your problem definition isn’t quite right or you need to re-scope. Many projects require a few iterations between Define and Measure. The important thing is that you don’t try to eat the elephant all in one bite (i.e. World Peace Projects), good quality data can be collected and that the outcome of the project adds real value to your customers and therefore to the business. Trying to calculate the cost of poor quality (both tangible and intangible) is valuable during the early stages.
    Sorry this is long winded – hope I’m not telling Grand Mother how to suck eggs – Tony

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    #180075

    Tony Hayward
    Member

    Les – we are definitely on the same wave length – think how much we are reducing the carbon footprint automatically by doing all those process improvement / variation reduction projects. My point is if we need to use reduction in GHG and carbon footprints to keep the funds flowing to do the right things let just do it. Maybe those running companies are more enlightened in the US, but not so the the UK. It is a perpetual battle trying to stop the bullies and fairies from flying from one disjointed initiative to another.
    The response following the initial question on carbon footprint must surely be a record – and full of politics – whats happened to Six Sigma? Well we have suffered (and still are ) from Blair and now brown, Personally I’m not sure who / what is going to screw the planet up most quickly – GHG’s or politians / bankers.

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    #180016

    Tony Hayward
    Member

    Hi Chad
    I’ve enjoyed all the crytic comments from everyone about reducing carbon footprints or otherwise!! But as we are enjoying probably the deepest recession in the UK in history, I’m game for making any worthwhile savings in waste. So if senior management buy into all this carbon footprint stuff, lets go with it and use our scientic knowledge and technical skills for maximum effect. Are you willing to extend your offer to George to send more data that you have, also to me. It will really be appreciated and well used by your allies across the Atlantic. My email is [email protected]. A recession must be the greatest and quickest way to reduce carbon emmissions!!! Thanks in advance – Tony.

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