REG : Logic to define the default purchaser in Purchase org

Hi SRM Gurus,

Need your help and suggestion in one issue.

In Standard system default Operational purchaser information responsible for processing shopping cart is not available.

The requirement is to determine the Default Operational Purchaser, as in standard SRM system Auto PO's will be created using RFC user, which means that, there is no buyers who has the ownership of the POs' and its changes. Hence this scenario is used to assign the ownership of the Auto PO's, since we are not using sourcing cockpit, so all POs' will be Auto PO's.

We dont have the Sourcing Cockpit scenario, so we thought of two possibilities :

1. By marking the lead buyer as the head of the organization ( A check box at the basic data tab at user level).

          Or

2. By maintaining a custom attribute at the buyer user level (Through SM30 view T77OMATTR).

Now I need suggestion from you all as if we use the first option the workload distribution would be high as each and every PO from a particular Pgrp would land into a buyers inbox and it wont be good as per the business perspective.

Please suggest me the solution for this issue.

Thanks,

Aakash Awasthi.