Hello Anu,
You can look at the P2P solution which covers from Requisitioning -> Ordering -> Receiving -> Invoicing. Also you can explore Contract management and the Sourcing solution which might be of help and you would be able to relate to from the SRM standpoint.
Also you can look at the integration perspective between Ariba and different ERP systems which might be the key requirement in any of the Ariba implementation as most of the clients would obviously make use of their existing ERP landscape for most of the activities.
Regards
Pramod