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Constraints and DPMO

Six Sigma – iSixSigma Forums General Forums General Constraints and DPMO

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  • #53428

    [email protected]
    Participant

    I need in help with two questions that was ask of me, I am new to six sigma. My name is Susan.

    1.How many constraints can a process have at any given time as viewed by the six sigma process?
    2.What would the equivalent DPMO for a process operating at 3.2 sigma and how do I calculate to get this answer?

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    #190054

    Strayer
    Participant

    Susan,

    1. Indeterminate. You can identify constraints using value stream mapping and related tools. ToC (Theory of Constraints) is a specific discipline for identifying, understanding, and managing constraints. 6ToC is an emerging fusion of SS with ToC. Search this site and elsewhere for info.

    2. It’s 44,500 DPMO. Very few of us actually do the calculation. We look it up in a table found in the back of many books on SS or use a sigma calculator such as the one found near the bottom of this site’s home page.

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    #190067

    Leader
    Participant

    Does that include the 1.5 sigma shift or no?

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    #190086

    Fontanilla
    Participant

    There is only 1 constraint at a time. Once you resolve a contraint, there will be a new constraint. But there is only 1 contraint restricting system performance at a given time.

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