PO Approval Workflow on item-level?

Question

I have a requirement to implement an approval workflow when the price or cost center/internal order is changed on the purchase order.
The problem is that as I see it, standard SAP only allows approval on header level for Purchase Orders.
Is there a way to handle approval on item-level if for example the PO has 2 rows, we change the cost center on both these rows to different ones???
Based on this cost center, the approval should then go to the cost center responsible and then his boss and so on based on the org-structure.

Answer 1

Hi,
  Consider a example , you have a PO and this PO has three items IT1, IT2, IT3. Based on the cost center, you want to send the respective item for approval to the respcetive KOSTL manager .
Desgin your workflow in this way.
1. Design a background activity step in  and a BOR method where it returns you all the items  of the PO and store these items in a multiline container element in the workflow container.
2. Now next to the above step include a [BLOCK step|http://help.sap.com/saphelp_nw70/helpdata/en/cc/18a8f409a93749b10e8dd9f9d81797/frameset.htm] in the workflow and choose par for each option and pass the items stored multiline container element. The use of the block step is it dynamically creates a parallel branches based on the number of rows in the multiline container element you mapped to the block step.
3. Now Inside the block step create another bor method and include a bacground activity step. Now in this BOR mehtod what ever the item you import try to determine the manager of the KOSTL(Cost Center.) and who ever is determined pass that user(s) name(s) back to the workflow container.
4. Next to this step include a decision step and choose the recipient type as expression and pass the container element in which  the KOSTL managers are stored, in this way you can send based on the item cost center to its respective manager.
Regards
Pavan