Intracompany sales/stock transfer management processes with WBS and New G/L

Question

Hi all,
we have a scenario in which we need to transfer project stock between two projects. Both belong to the same Company Code. The transfer must be conduct as if it was a sale.
Basically the scenario is the following:
1) Material A is in stock of Plant P1 under Project WBS1 (linked to Functional Area FA1).
2) Plant 2 needs to "purchase" that stock and put it under WBS2 (linked to Functional Area FA2).
We have new G/L with the Functional Area set as a balancing dimension so any transfer between the two Plants should generate a billing document to balance the two Functional Areas. The stock should be moved between the two Plants/Projects.
How would you manage this scenario in SAP?
I've read all the documentation related to Intercompany Business Processes in SD Billing and everything related to Transfer Prices with New GL however I've found no information on this particular scenario.
In particular, the STO cannot be used since it allows only to move the stock between two Plants without having the WBS dimension on the receiving plant (i.e. I can move stock from Plant P1/WBS1 to Plant P2/WBS1 - which is not what I need since I need it on WBS2). Besides, but I'm not sure, the automated billing seems to be possible only in case the transfer is between Plants belonging to different company codes (I still need a FI document for balancing the Functional Areas).
The transfer price scenario, which is the one recommended by SAP for Intracompany sales, is not applicable as well since we don't have Profit Centers and, as far as I've understood, it doesn't seem to allow stock transfer between different WBS as well.
The only scenario I thought so far is to use a Purchase Order/Sales Order scenario:
The PO would allow WBS2 to receive in Plant P2/WBS2 the stock purchased against internal vendor Plant P1.
The SO would allow WBS1 to sell the stock (i.e. issue it from Plant P1/WBS1 to internal customer Plant P2).
The billing would be done against the SO and the incoming invoice would be posted against the PO (hence recognizing internal revenues and internal expenses).
This process, however, requires a lot of reconciliation activities and is error prone as there is no cross-check between SO and PO data.
Do you have any hints or suggestions to manage this differently?
Thank you in advance for your help.
Ciao!
Max

Answer 1

Hi seesen_rs,
thank you for your answer.
We also thought of that but the issue is that the 301Q moves stock immediately while we need to monitor the order and the shipment of the material (the 301Q is posted when the goods arrive at P2/WBS2). Besides, we also need to consume budget upon order so the PO/STO would help us for the first part of the process (i.e. when the goods are requested from P2/WBS2), then we should do the 301Q and then the billing. In order to keep the whole document chain linked we should also make us of custom fields. An alternative would be to use direct Goods Issue and Goods Receipt however they would have no references for budget and material requirement tracking purposes, hence not very helpful.
Also SAP said there is no easy way for managing this
Ciao!
Max