Multiple PO document types/transaction types in Extended Classic scenario
We are on SRM_SERVER 550, Extended Classic Scenario.
We have a requirement where we need to create multiple PO document types (based on certain criteria).
I have noticed that in standard, there are only 2 transaction types provided for SRM PO - ECPO and ECDP.
We need more document types and these should be triggerred automatically after SC is approved.
I understand that we need to maintain all the PO transaction types in SRM, number ranges in SRM then maintain the same transaction types as PO document types in R/3 and same number ranges in R/3.
I also understand that the change for document type needs to be done in BBP_DOC_CHANGE_BADI.
I have 2 specific questions:
1. We need to maintain attribute BSA for the users. Here we need to mention the document type and source system. What should be the source system mained in attribute BSA for ECS? Should it be the SRM system or R/3 system?
2. In BBP_DOC_CHANGE_BADI to change the PO document type/transaction type in ECS scenario, which field should be changed? Should it be ET_ITEM- BE_DOC_TYPE?