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One Pugh matrix for each function in DFSS?

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  • #44750

    JM
    Participant

    Hi, our team is coming up with high level design concepts in a DFSS.  We have the basic functions that came out of QFD II and will be brainstorming based on those functions.  Should we combine functions into an overall product and find concepts at that level, then take that into a single Pugh or take each function and find concepts for that particular function so that we have multiple Pugh’s?  Thanks.

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    #144425

    Bill Fowlkes
    Participant

    It will could be done either way, the thing you want to avoid is an imbalance in your Pugh process.  In otherwords, either do only system level concepts with all the functions, or one subsystem concepts with the relevant functions only.  But, if you do the latter, it should be followed by a full system analysis once you have your superior subsystem concepts.

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    #144494

    Jonathon
    Participant

    IIf you remain at a point where one or more options could be combined into a number of different packages, then Pugh is not the right approach. Pugh applies when the options truly are mutually exclusive. For instance, a given floor can be covered in tile, carpet, wood, laminate, stamped concrete, etc., but it makes no sense to put wood over tile.If you need any more guidance, reply to this message and I’ll try to clarify further.

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    #146494

    melvin
    Participant

    The approach of high level system design using a single Pugh, followed by cascading through component and sub-component concept identification and then design will promote integration from the beginning.  The latter approach can lead to much iteration as you create detailed dsigns that must be integrated.
    However, need for the higher level integration depends on the degree of interdependence at the lower levels of design.
    Bob   

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    #173684

    Pai
    Participant

    Hi:
    I am working on a pugh matrix and have come up with scores.  The scores are in negative what do I infer from it and how are the scores used in the analysis.
    Thanks,
    Rajesh

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