Order Management Service Item R12.1.3

hi,

i setup service item as interfaced after book sales order , my case if there are more items on Sales order and these items has a service item so if there are 10 items then there are 10 serivce item but when book this sales order 10 service items will be interfaced but i want any item interfaced to Oracle receivable the relivant service item interfaced with it's item , i tested fullfillment set but is need to long time to assign every item to it's service item . can help me to solve this issue?

Thanks