Factory acceptance testing (FAT) for industrial equipment from China

What a Factory Acceptance Test actually is

The Factory Acceptance Test is the contract-defined acceptance event held at the manufacturer’s premises before the buyer accepts shipment. It verifies that what was contracted is what is being shipped: the technical specification, the drawings, the performance requirements, the certifications, and the documentation package. A clean FAT means the buyer takes physical delivery of equipment that has already been checked against contract terms, with defects identified and resolved before they cross a border. The FAT sits at the end of the broader factory-control programme — the earlier checkpoints (covered below) are what make the FAT itself efficient rather than the only line of defence.

For a deeper definition and the breakdown of what a FAT actually covers in practice, see what is a Factory Acceptance Test for industrial equipment. For the twelve-section working checklist Sinospect applies on the day — readiness, document requests, test plan, identity, functional witnessing, non-conformities and release decision — see the factory acceptance test checklist.

Why FAT matters for industrial procurement from China

Three reasons FAT is structurally more important when the manufacturer is in China and the project is on another continent:

• Cost asymmetry of late discovery. A non-conformity caught at the factory costs hours of supplier time; the same non-conformity discovered after shipping, customs clearance, transport to site, and installation labour costs materially more, with schedule consequences as well as direct cost.
• Documentation acceptance for lenders and end clients. Project-financed and lender-monitored projects require dated, signed test records that can be incorporated into the project handover dossier. The FAT is when those records are generated.
• Negotiating posture during corrective action. Suppliers are far more responsive to corrective-action requests when the equipment is still in their factory, the payment milestone is unmet, and the relationship to their next contract is shaped by how they handle the current one.

The factory-control programme around the FAT

A strong factory-control programme is not a single event at the end of manufacturing. It is a sequence of checkpoints spread across the production cycle, with the formal FAT as the final acceptance event:

• Pre-production review — drawings, material certificates, sub-supplier qualifications, and the inspection and test plan are reviewed before manufacturing starts. The cheapest defects to fix are the ones not built into the equipment.
• In-process inspection — work-in-progress checkpoints during manufacturing (welding, machining, sub-assembly), so non-conformities are caught before they are buried inside a finished unit.
• Pre-shipment verification — final visual inspection, packing review, documentation cross-check against the contract and the certificates, container loading inspection where relevant.
• FAT witnessing — the formal performance testing of the finished equipment against the specification, attended by the buyer or buyer’s representative, generating the dated and signed FAT report.

The FAT itself is one acceptance event in this sequence — and one of several test/handover events across the equipment lifecycle. The table below disambiguates the events that are often loosely grouped together.

What a FAT delivers in writing

The output of a FAT is a documentation package, not just an email saying the equipment passed. A complete FAT package includes: the inspection and test plan that was followed, the test results against each specification line item, the calibration certificates for the test instruments used, photographs of test setup and equipment condition, the non-conformity log with each finding classified by severity, the corrective-action register with dates and sign-off, and the final FAT certificate signed by the witnesses.

That package is what the buyer presents to the lender, the end client, or the project insurer to support release of payment milestones and the eventual handover.

Common reasons a FAT fails

• The inspection and test plan was not agreed in writing before manufacturing started, so the supplier ran the tests they considered standard rather than the tests the buyer expected.
• Calibration certificates for critical test instruments were missing or expired — making the test results technically unsupportable.
• Sub-supplier components arrived late, were tested under time pressure, and were waved through with non-conformities the supplier preferred not to surface.
• Documentation deliverables (manuals, electrical schemes, spare-parts lists) were prepared at the last minute and do not match the as-built equipment.
• The witnessing party did not have the technical authority to refuse acceptance, so non-conformities were noted but not blocked.

When FAT should be planned in the project timeline

FAT planning starts at contract signature, not at the end of manufacturing. The inspection and test plan is agreed with the supplier as part of contract execution. The witness party is identified and committed in time to be available when the equipment is ready. Lender or end-client participation requirements are clarified early so the right people are present.

A FAT that is scheduled three weeks before the contracted shipment date — rather than three days — leaves room to address non-conformities without forcing the buyer to choose between accepting defects and triggering a late delivery.

Frequently asked questions