Site Acceptance Test (SAT) — definition
Formal verification test performed after equipment installation at the buyer's site, confirming it operates correctly under actual site conditions and integrations.
A site acceptance test typically checks equipment performance with real utilities, integration with upstream and downstream systems, and site-specific environmental conditions that cannot be fully replicated during factory testing. Successful SAT completion is commonly a prerequisite for final acceptance and warranty commencement.
Why it matters to industrial buyers
SAT confirms that equipment performs as required once integrated into the actual production environment, which factory testing alone cannot fully verify.
Key reference points
Common prerequisites
Utilities connection, safety commissioning and completion of installation are typically required before SAT can begin.
Acceptance linkage
SAT completion commonly triggers final acceptance and the start of the warranty period.
Commonly confused with
Factory Acceptance Test (FAT)
SAT is conducted after installation on site under real operating conditions; FAT is conducted at the factory before shipment under controlled or simulated conditions.
How it is used in practice
After installation, the buyer and supplier jointly conduct a site acceptance test to confirm the line meets specified output rate under actual production conditions.
Frequently asked questions
Can SAT be skipped if FAT was successful?
Generally not recommended, since site integration and utilities can affect performance in ways a factory test cannot replicate.
Does SAT completion mark project handover?
It is often a key milestone toward handover but is typically followed by punch list closure and formal handover documentation.
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Related terms
Factory Acceptance Test (FAT)
Formal verification test conducted at the supplier's manufacturing facility to confirm equipment meets agreed specifications before shipment to site.
Commissioning
Systematic process of testing, adjusting and verifying that installed equipment and systems operate together as designed before handover to operations.
Punch List
Itemised list of outstanding defects, incomplete work or deviations from specification identified during inspection, requiring correction before final acceptance.
Mechanical Completion
Project milestone confirming that all equipment and systems are physically installed, connected and inspected in accordance with design, prior to commissioning activities beginning.
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Reference content only. Global B2B Group is independent of equipment manufacturers and financing institutions; definitions are provided for education and do not constitute engineering, financial or legal advice.