Hi Hari,
You can use the class method interface 'IF_EMMA_CASE_FORWARD' for your requirement.
This class method is provided in order to define the customer preferred way of forwarding the cases to end users.
For example if a workflow needs to be started or an email notification or service order needs to be generated in the system based, then this class method needs to be implemented and case category customizing has to be correctly maintained.
This interface has only one class method ‘FORWARD'
Hope it helps...
Thanks,
Amlan