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Third party drop ship - change material once Preq/PO is issued

Former Member
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Hi Experts,

     We are using third party drop ship process to place spare part orders with our vendors. At times, the vendor could send an exception message (EDI) to correct the material being used as we could've initially sent incorrect material number. So ideally we would want to update the existing sales order line item with the new/changed material that the vendor has sent. This is not allowed as there is a subsequent Purchase requisition and PO linked to the Sales order.

  Is there a standard way of handling this? I know we could instead delete the PO and Preq line and reject the sales order, then add a new sales order line with the new material and let the new Preq and PO be created. Since all this is handled automatically via EDI, we would want this automated and hence I was looking for standard options. Also, we would like to use the same PO number that is sent to vendor instead of generating a new one.

Any help would be appreciated!


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Former Member
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Thank you all for the quick response.

Once the EDI message is sent to the vendor, if there is a subsequent change in the delivery date or quantity, this can be easily handled by changing the sales order directly and  this updates the third party PO automatically and sends the vendor an updated message. In this case we can retain the same sales order line and PO line item.

However we run into an issue with material change. The vendor uses the same materials as we do, sometimes we might send the vendor an order with material A and the vendor might change it to material B (because both are same, or no stock available, superseded etc). In such cases we will need to update our sales order appropriately with the new material number. Since date/quantity change was allowed on the preceding document, I was hoping the material could also be changed.

Deleting the PO and Preq line does not make the material field on the sales order editable. I could only think of rejecting the sales order line and creating a new line items, which in turn creates new Preq and PO. We wanted to retain the same PO and line as this will be used as the reference on our vendor's sales order.

Former Member
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Material superseded - This situation should be addressed. There should be internal procedures when this situation arises, what is the communication flow and result in material being flag off for use in SAP.

No stock available - Procedure changes is required, would not recommend automatic system change.

When new SO item is created, a new po is created. You can reject the new PO. Copy the PR and item number, put it back to your old PO. There is a purchase requisition number and item number field in PO overview screen. Here you can link back to old PO under another new item. If you have EDI, your user will have to do idoc corrections, unless your vendor can change the PO item mapping, this saves your user's headache in ammending idoc.