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FAT

FAT — Factory Acceptance Test

A formal test performed at the manufacturer's facility to verify that equipment meets specified requirements before shipment.

Definition

A Factory Acceptance Test (FAT) is a documented verification process conducted at the manufacturer's or supplier's facility to demonstrate that equipment, systems or assemblies comply with contractual, engineering and functional requirements before delivery. FAT activities typically include functional testing, inspection, documentation review and customer witnessing.

Why It Matters

FAT provides confidence that equipment satisfies design requirements before shipment, reducing commissioning issues, rework and project risk.

In Practice

Factory Acceptance Tests are normally performed using approved test procedures with documented acceptance criteria and may involve representatives from the supplier, contractor and owner/operator.

Common Misuse

A Factory Acceptance Test is performed before shipment at the supplier's facility, whereas a Site Acceptance Test verifies equipment performance after installation.

Term Details
Synonyms:
FAT; Factory Acceptance Test; Factory Test; Acceptance Testing
Classification:
Quality Assurance
Methodology
Intermediate
Applications

Quality Assurance; Engineering Design; Commissioning.

Where It's Used

Equipment procurement.; Capital projects.; Quality assurance.; Vendor management.; Commissioning.

References

IEC 62381; IEC 61511

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