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How to define uom conversion on each PO?


Hello Gurus,

I have a question on how to define the conversion of UOM on each PO.

I set the order unit BDT and the SKU M3, variable OUn on purchasing view material master = 1.

I need to set on the PO for today 10 BDT = 12 M3 but another PO for tomorrow 10 BDT =13 M3

This is depend to the drymeter even for the same vendor.

Is the only way by changing the Purchasing Info Record?

I did it and it works but I don't want to change the PIR everytime create a PO, cause a lot of PO should be maintained.

Please advise if another possibilities solution.

I check some thread but nothing match with the requirement.

Thanks before.

Wiliam Rusdianto

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3 Answers

  • Posted on May 15, 2015 at 05:15 AM

    Where do you want to store the conversion ? How can SAP know what will be the next conversion ?

    Obviously you need to store these all conversions in somewhere in SAP system.

    In purchase order, system will fetch the conversion from three different places with different method.

    If you are using batch number in purchase order line item, then system will take the conversion from batch classification. If you are using purchase info record, then system will take the conversion from purchase info record. If there are no purchase info record/batch number, then system will take the conversion from material master record. By any method, you have to change the conversion when it got changed in your business case.

    If you are ready with your own custom development, then you can store this information in a Z table, system will take the conversion from this Z table during PO creation according to your logic.

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    • Changing the info record back and forth is certainly not SAPs design for that. And of course the existing PO is unaffected by such changes, since those conversions are copied over to the PO. But if they would be changeable in the PO then you could have a big mess in your system as it goes out of control. I actually believe you have already created such a mess in inventory management with this changing of master data. What does your stock overview give you after you have received the order quantity from both POs? Is this really satisfying your needs?

  • Posted on May 15, 2015 at 06:34 AM

    Have a look into Catch Weight Management , which is the usual method to handle materials with different number of units. Rupesh described the whole process very well in his document, including the PO part.

    The other option might be variant configuration. see the docu for Configurable Materials in Purchasing

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  • author's profile photo Former Member
    Former Member
    Posted on May 18, 2015 at 07:00 AM

    Many thanks All, I will read and discuss with the business owner.

    Will comeback soon.

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