R12.1.3 - Service request/Tasks - GL Accounting entries after debrief and before & After Invoicing

Hi

Im on R12.1.3 and trying to workout the Business process: Onsite repair by technician using Service request/Task

Role: Service coordinator

Create a Service request ,task .

Assigns the field service technician to the task.

Print or email the task details to the technician

Role: Technician

Technician performs onsite repair

He reports back to the coordinator the material,labor and expenses incurred for this onsite repair.

Role: Service coordinator

Service coordinator performs the debrief on behalf of the technician and completes the debrief.Submit charges to generate the invoice(Labor,Material,expenses

transactions are Bill only line types) and then closes the task/Service request.