Site acceptance test is the post-installation verification that confirms equipment performs correctly in the customer facility environment after delivery and hookup - it proves shipping, installation, and utility integration did not compromise tool readiness.

What Is Site acceptance test?

• Definition: SAT phase executed at the fab after mechanical install, utility connection, and safety clearance.
• Validation Focus: Facility interfaces, subsystem operation, alarms, and key readiness checks under site conditions.
• Environment Difference: Verifies behavior with customer power, gases, water, exhaust, and network controls.
• Release Context: Successful SAT typically enables transition to process qualification stages.

Why Site acceptance test Matters

• Integration Assurance: Confirms tool and facility interfaces are correct before process-critical work begins.
• Shipping Damage Detection: Identifies transport-induced misalignment or latent component failures.
• Safety and Compliance: Validates interlocks and utility behavior under actual site constraints.
• Startup Risk Reduction: Prevents hidden installation issues from appearing during production qualification.
• Accountability Clarity: Documents whether open issues belong to vendor delivery or site integration.

How It Is Used in Practice

• SAT Checklist: Use standardized tests aligned to FAT baselines and site-specific requirements.
• Gap Closure: Log and resolve SAT deviations before advancing to PQ or production release.
• Handover Evidence: Maintain signed SAT package as part of qualification and audit records.

Site acceptance test is a required installation-integrity checkpoint in tool commissioning - passing SAT confirms the equipment is correctly integrated and ready for process capability verification.