I want to know about the Oracle Purchasing, Inventory and Project Costing module details. I'm interested to know what the technology expertise does it require if I want to be the active role member in the implementation. i.e. not just as the maintenance fellow, but infact I want to be the active member, so in future I can develop and deploy the plugins as required and my not be available in standard package. So what should I learn and know about. Please suggest me. It's very urgent.