I have a following process which is a part of a Real-estate maintenance company business:
- Company signs contracts with residental buildings for maintenance of installations and equipment(like elevators, roofs etc...)
- Customers are billed according to the contract once a month, same amount (no matter if some maintenance work had to be done or not)
- Company sometimes hires supplier technicians that provide labor and material to complete the maintenance work.
From a field service point of view, task which is completed has its labor,material and expense lines. When task is appointed to supplier technician, all these debrief lines should,once the task is closed, be a part of automatic requisition and receipt without any charges for the customer.