### Instruction: What does FAS, MTO and ATO stand for?
### Input: Final Assembly Schedule, often abbreviated as FAS and sometimes referred to as finishing schedule, is a schedule of end items to finish the product for specific customer orders in a make to order (MTO) or assemble-to-order (ATO) environment.
### Response: FAS = Final Assembly Schedule
MTO = make to order
ATO = assemble-to-order