Hi,
Define service order & Nitification type in customizing(SPRO) and assignment from notification type to service order.
And create pofile for resource related billing as DIP Profile through given path:-
IMG Menu path: Sales & Distribution Sales Sales DocumentsCustomer ServiceProfile for Resource Related Billing
1- Create profile
2-Assignment from DIP profile to sales document type
3-Materials that need to be determined
4-DIP & Mat/Serv assignment from material determination criteria