HI Arun,
Thanks for explaining the requirement in detail.
In R12 the approval controls was by enabling "Use Approval Hierarchies" checkbox in the financial options of Oracle Payable/Purchasing module where you are setting the configuration to use positions and position hierarchies to determine approval paths for your documents within Purchasing.
But in Fusion Invoice approval rules are the policies that describe an invoice approval flow. Oracle Fusion Payables provides configurable predefined invoice approval rules as well as the ability to add rules using the Approval Management extensions (AMX) of the Oracle SOA Suite and Oracle Human Workflow. The Oracle Business Process Management (BPM) Worklist Application provides the interface to administer the rules.
1) So when you initiate approval for an invoice, Payables invokes the invoice approval task, which in turn invokes a set of approval rules created in AMX to build the list of approvers. AMX then sends out approval notifications to the first set of approvers, and every time it receives a response to an approval notification, AMX sends out approval notifications to the next set of approvers on the approval list. This process is repeated until all approvals are complete.
2)A BPM Worklist administrator can access the rules in the BPM Worklist(Arun you need to check whether you have the role assigned to your user ID with these privileges). If not add this FUN_FINANCIAL_APPLICATION_ADMINISTRATOR_JOB role will be a BPM Worklist Administrator.
3)To access the BPM Worklist for Financials, select View - Servers - Financials from the Worklist table on the Oracle Fusion Applications home page.
4)To access the invoice approval task, click the Administration link, click the Task Configuration tab, and then click the task FinApInvoiceApproval from the left hand pane named Tasks to be configured.
5)The FinApInvoiceApproval task configuration has event-driven and data-driven settings. The event-driven settings include assignment and routing policies. The data-driven settings include the approval rules.
Assuming that you have above roles with required access and can try madifying AMX based on your Org structure(Hierarchy) and let us know the results.
Thanks & Regards
Krishna Roshan