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Constraints and DPMO

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  • April 26, 2010 at 1:18 am #53428

    [email protected]
    ★ 10 Years ★
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    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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    April 26, 2010 at 3:57 am #190054

    Strayer
    ★ 10 Years ★
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    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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    April 27, 2010 at 1:54 am #190067

    Leader
    ★ 10 Years ★
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    Does that include the 1.5 sigma shift or no?

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    April 29, 2010 at 8:34 am #190086

    Fontanilla
    ★ 10 Years ★
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    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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