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Parallel boxes in VSM

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  • #48017

    G
    Member

    Hello there. How do we capture parallel process steps in a VSM ? I am finding it difficult because both the steps are timeline items and one is a value added activity while the other is not.

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    #160676

    The New MB
    Member

    Good  Question

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    #160678

    qualitycolorado
    Participant

    Santosh, Good morning!
    Here is one useful reference regarding your question about parallel activities in a Value Stream Map, from the University of Michigan (which, by the way, has a very good Lean course):http://www.engin.umich.edu/class/ioe481/coursepack/4%20Flowcharting%20&%20Value%20Stream%20Mapping.doc
    As noted in this reference:
    ” … if there is a decision point between two parallel processes, feel free to integrate the decision triangle from process mapping into your Value Stream Map … “Remember, the value stream mapping is only one tool available to you for your improvement Projects. Value stream mapping is a very powerful tool, but it does NOT replace “regular” process mapping, since process mapping and value stream mapping can be used together to get the complete picture of the process you are studying and improving. Process mapping should be used to map out more detailed processes where there may be numerous branches and/or decision points and/or non-linear or micro level processes in play. Remember, use your full toolkit, and pull out the tools that make sense, where they make sense.
    Best regards,
    QualityColorado

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    #160679

    Regression
    Participant

    For your specific question regarding the parallel flow, check out the demo of igrafix Value Stream Mapping tool (click on the quick tours for value stream mapping, the is a short clip on parallel processing 3 minutes into the demo.  
    http://www.igrafx.com/resources/quicktours/

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    #160692

    Shan
    Member

    before mapping the process, just understand what is your critical path actvities, It’s lead time taken in this path is going to affect the total    thru put of your product.
    parallel path process can be mapped, for your information. However it will not affect the Lead time or thruput.
    shan

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    #161081

    Psyc
    Participant

    If one of the processess is NVA then eliminate it.
    Why waste time doing things that do not ad value?
     
    Psyc

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    #161090

    Rick Haynes
    Member

    Just removing steps because the group think or conventional wisdom says it is Non-Value added is risky.  Many a book learned Lean leader quickly drops a process step that the team voted as non-value, then claims a savings in labor, finds out in a few days or weeks that the step was important when it was instituted years ago, and no one remembered.
    Never drop a process step until you can verify that there are no unrecognized down stream effects.  I can not count the number of times I have had to help business recover from well meaning lean efforts like this.  Too many for sure.

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