iSixSigma

SIPOC Help

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  • #55564

    Philip Prendeville
    Participant

    SIPOC

    Hi all,

    I’m new to SIPOC and just need some feedback on the diagram I created. I’m getting a little confused between suppliers and customers. Could anyone please confirm whether I have made the right decisions on who’s a supplier and who’s a customer please.

    The SIPOC is being done on a process for AB Automation.
    Parts are shipped to Marchant Engineering (ME) who provide a service.
    Once they are finished ME ship the parts back to AB Automation.

    Step 1: The supplier is internal in the form of the design, assembly or production department who give the parts to Production Support (PS). They tell them the parts need to ship out for anodising (usually asap).
    I’m pretty sure of the suppliers/customers in this step but not so sure of others.

    Step 2: PS prepares a delivery note and PO prior to calling ME.
    Am I right in saying PS now becomes the supplier?? Or is it the other way around? I’m confused here.

    Step 3: PS calls ME and gives them purchase order.
    Same query as in step 2??

    Step 4: Parts now prepped for delivery to ME.
    Again same query here.

    Step 5: PS calls delivery company (sometimes TNT, sometimes DPD) and arranges collection.
    I’m pretty sure I’m right on this one.

    Step 6: The package is collected.
    Does the delivery company now become the supplier and ME the customer?

    Step 7. Goods shipped back from ME to PS.
    Pretty sure of this also.

    Thanks in advance.

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    #200535

    MBBinWI
    Participant

    @pprendeville – let me make it simple for you. A supplier provides something to you, a customer receives something from you.

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    #200537

    Philip Prendeville
    Participant

    I guess what’s confusing me is that Marchant Engineering provide us with a service so they are our supplier but we supply them with the parts first so in the SIPOC I have Production Support down as the supplier and Marchant Engineering as the customer. I’m not sure if I’ve got this right.

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    #200557

    Strayer
    Participant

    You’ve run into a flaw in SIPOC. It assumes that a process is linear but many processes are not. It’s okay to have a customer who is also a supplier as long as you make clear that what they supply and what they receive are different things. I prefer a graphical SIPOC that shows the flow(s) between suppliers and customers through the process but doesn’t require duplication when one is both supplier and customer.

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    #200558

    Philip Prendeville
    Participant

    That makes sense Strayer. Would you have a link to an illustration of this type of SIPOC that shows flows between suppliers and customers?

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    #200559

    MBBinWI
    Participant

    @pprendeville – treat an entity as a supplier when they are providing you something, and as a customer when you are providing something to them.

    You are trying to do too much with one SIPOC. This issue that you identify should not be a problem. You should only create a SIPOC for one specific process (or step in a complex process). Even if you are receiving raw material from an entity (supplier) and providing them the worked material (customer) you should not have a problem, just list them on either side. You have certain expectations/obligations for a supplier, and others for a customer. Just apply them appropriately to the entity at the correct stage.

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    #200570

    Philip Prendeville
    Participant

    So I should have multiple SIPOS diagrams, one for each step? That doesn’t make much sense to me, seems to be a huge amount of work.

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    #200572

    Chris Seider
    Participant

    Consider why you’re doing a SIPOC.

    1. Get you aligned with the team on how process BROADLY works.
    2. Alignment with you and your project champion.

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    #200575

    MBBinWI
    Participant

    @pprendeville – unless you are a masochist (or if you’re requiring others to do the SIPOC, then a sadist) you should only be doing the diagram for the issue that you are addressing.

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    #200583

    Strayer
    Participant

    To the point. In my first response I should have said “limitation” rather than “flaw”. SIPOC isn’t intended to be a process map. A lot of stuff happens inside that “P” in the middle. Treat it as a “black box” where only see what goes in and what comes out.

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