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Value Stream Map- Two independent Process combining giving Next Process

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  • #255467

    pank
    Participant

    Hello,

    I am working on a Value stream map for a process. I am confused about calculating the production and lead time for a process.

    I have two independent processes in my value map and they are combining together to give one single next process. I am confused about how to include their time together in the whole process for the Production time and lead time. I also attach the screenshot of the problem, Please find the attachment. Looking for guidance.

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    #255487

    Strayer
    Participant

    We tend to overcomplicate. I’d look at the main process by itself and treat the contributing processes simply as steps. If one is causing an NVA situation, that will become clear. And then you can look at that by itself to better understand why, and how to improve it. If you’re familiar with Theory of Constraints, I’d look at the VSM in those terms. ToC identifies the bottleneck that constrains the process. That is, the process cannot be faster or more productive than allowed by that constraint and, according to ToC, anything else you try to improve is either ineffectual or causes more waste, such as accumulation of WIP inventory. You may find that one of the contributing processes is the constraint. Then and only then should you look at the details of what’s happening there.

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