Factory acceptance testing, commonly called FAT, is a verification process conducted before equipment or an assembled system is delivered to its final installation site.

Depending on the project, testing may evaluate hardware functionality, software configurations, control systems, network-related capabilities, or compliance with defined technical requirements.

FAT is more common for complex or specially configured systems than for ordinary off-the-shelf guest room appliances. The objective is to identify problems before equipment arrives at the hotel, when corrections may be easier to make and less disruptive to the construction schedule.