iSixSigma

Yu

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  • #190693

    Yu
    Participant

    It will be appropriate if you state India lagging in Lean and Sigma. I do not think China and other Asia countries are slow in the lean sigma champaign.

    IBM proposed a new term “Green Sigma” years ago to intergrate Lean Sigma methodogy with green technology.

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    #162814

    Yu
    Participant

    Hi GKP,
    A  process with a random natural variation when there is no assignable cause involved spreads itself to three times its std. deviation on either side of the mean. Now it is an assumption that if your specification level is twice your natural variation spread when the process is in control, then you have ample space to play around (read shift of central tendency or accomodate occational outliers) and at the same time not produce any defects.
    This gives a prcess capability (CPk) of 2 and Mr. Mike Harry and Mr. Bill  Smith named this condition of the process as Six Sigma.
    So having a smaller std. Deviation is better whereas one should aim to achieve a process capability of 2, which is six sigma level.
    3.4 DPMO mathematically corresponds to 4.5 sigma, because once you reach six sigma level your process tend to shift 1.5 sigma to either side of the mean in long term.
     
    Thanx,
    SSG
     
     

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    #115103

    Yu
    Participant

    CM:The company I work for has a CMS (Corporate Manual System) that would blow your socks off… volumes upon volumes of SOP. It seems to me that the only time it’s being referenced is when problems arise, which was not it is inteded for. We have now adopted a 5S approach, and there is lots of reading on 5S, which include ‘Standardize’. Our company is making progress in this area, but have a long way to go. One book on the subject of Standard Work you might want to consider is the Standard Work for the shop floor, (created by the Productivity Press Development Team) it’s more of a LEAN approach but well worth a look given your goal of SOP.
    ~ssg
     

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