The correct purchasing group is not being determined in the SC line item

Question

Dear all,
I have a problem in that for some reason, when a shopping text line item is added to the shopping cart, the wrong purchasing group is determined. Further more when you look in the basic data section they is a drop down against the purchasing group field listing all pruchasing groups setup in the org plan via PPOMA_BBP.
This means that the requisitioner can change the purchasing group to any one even the one that is not relevant to his or her Purchasing Organisation. This of cause is not right because if the requisitioner is allowed to change the P/Grp, the wrong buyer may end up recieving the buyer completion work item.
What is causing this?
We have uniquely assigned P/Orgs to P/Grps and assigned resposiibility of P/GRPS to one unique ORg unit (company).
for example, a suppose product Category 1234567 is assigned to P/GRP 100 & P/GRP 100 is assigned to P/ORG 1000 and the P/GRP responsibility is set to Org unit(company) 1000,  The requisition "sits" under an orgunit linked to company 1000.
If a requisitioner creates a text item and assigns product category 1234567, when the item is added to the shopping cart , I expect to see that the followig:
1. The Company code(CC)should be 1000 (This is happening)
2. The P/org should be 1000(This is happending)
3. The Plant sssignment is correct
4. The p/grp is worong. It appear that the first P/Grp is assigned plus a drop down listing all p/grps created for all purchasing P/Orgs.
Regards,
Grace

Answer 1

Yann,
Yes , we have (need to have)set 2 purchasing groups with the responsibility of the same product category. We have to do this because in our organisation, individual company purchasing organisations have same responsibilities to purchase similar products.
Please note that we have a classic scenario implementation. SRM 4, Server 5.
The business requirement and settings in the org plan is for example:
P/Grp 100 has the reponsibility to procure Prod cats LAM001 to LAM010 via its assigned P/org 1000 which is linked to  own company 1000 and P/grp 200 also has the reponsibility to procure Prod cats LAM001 to LAM010  via its assigned P/org 2000 which is linked to own company 2000.
Please note that thr buyer responsible for p/grp 100 & 200 are the same and will be the same for similar product cats across the organisation as a whole. Its just the SRM does not allow you in the orgplan to assign the same p/grp to multiple p/orgs, we had to double up on the p/grps.
Also when a requisitioner who sits under company 2000 chooses a product cat 12345 if creating a SC text line, we DO NOT WANT the requisitioner to change the assigned p/grp.We want it defaulted to 200 (based on the org plan setting I have described above) and fixed(greyedout)
when thr line item viewed in the basic data section.
Do you think that because we have set the prod cat range LAM001 to LAM010, which is an alphanumeric product cat range, that could also be the reason for the dropdown listing all orplan p/grps even ones that do not have the product cat LAM001 to LAM010 in its responsubility assignments?
If you are saying that the system does not know which p/grp to pick, why its it displaying all "unrelated" p/rps in the dropdown. I atlest expect to see two p/grps in the dropdown 100 & 200, because only these two p/grps have been set with product cat responsibility for LAM001 to LAM010 in our org plan.
Also if you are saying that is the way SRM was designed to work (which may be the case!!!) how then can we set the org plan to meet our the purchasing org/purchasing grp /prod cat responsibility requirements I have described above?
Regards,
Grace