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what is the inside meaning of 7 wastes of lean?

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  • #30209

    hedong wang
    Participant

    They 7 wastes consist of:1. Overproduction2. Transportation3. Motion4. Waiting5. Processing6. Inventory7. Defectsbut i don’t know the true meaning of  Motion,Processing. who can tell?

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    #78457

    James A
    Participant

    For Motion – this refers to the movement of tooling etc within a machine.  e.g. during a CNC cycle it does not make sense for the tooling to go to 0,0,0 every time a tool is changed, and then start cutting.  It does make sense for tooling to have non-cutting travel reduced to the minimum required (without clouting the job!) 
    It could also refer to movement of materials/parts within the plant – e.g not having Op 10 and Op 20 next to each other, but separated by a long walk (some people may class this as Transport, but as long as you clearly define either transport within the plant or transport outside the plant, it’s OK)
    For Processing – this is re-work – i.e. not getting it right the first time, and having to do it again off-line.
    Hope this helps
    James A

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    #78461

    Ron
    Member

    Motion refers to those activities that the employees must make in order to complete their assigned task.
    For example if you are completing a form and you have to walk to the file cabinet and retreive the form then walk back to your desk to do data entry then walk to your boss for his approval then walk to the copy machine then to the fax machine.  All this “Motion” is contained within the single step of the process.
    In manufacturing it may be that motion that a machine or an employees has to do to complete the step of the process. Physical motion

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    #78471

    billybob
    Participant

    Hello folks, 
    Try this link for the seven waste types.
    http://www.mle-consulting.com/mfgr/deadly_wastes.html
    You’ll see processing is waste within the process itself that is not maintained.  Rework actually comes under defects.
    Later,
    Billybob

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    #78477

    James A
    Participant

    Hiya Billybob,
    Thanks for the link.
    As far as what goes where is concerned, I think it probably depends on who taught you in the first place – where I was it went “Scrap, Overproduction, Inventory, Motion, Processing, Transport, Waiting” – so all the key elements are in there – just not in the same order.  The important thing, I think you will agree, is that the wastes are identified and eliminated.
    Any other definitions/orders/variations are probably due to regional variations and semantics – neither of which are really worth a bean.
    Give the possums a scratch from me.
    James A

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