Factory Acceptance Test (FAT)

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This post was last edited by Zhongyuanren on 2025-5-3 11:49. Factory Acceptance Testing (FAT) 1. Definition and importance of FAT Factory Acceptance Testing is a critical verification activity carried out by manufacturing companies at the supplier’s site before the equipment leaves the factory. Its purpose is to ensure that the equipment’s design, manufacture, and functionality meet the user requirements, functional specifications, and regulatory demands. The core goal of FAT is: • To shift risks forward: identify and resolve potential defects before the equipment is delivered to the site, thereby reducing delays in subsequent debugging and verification stages. • Compliance assurance: Standardized testing procedures are employed to ensure that the equipment meets regulatory requirements such as GMP. • Quality assurance: Verify critical process parameters (CPP) and quality attributes (CQA) to provide data support for subsequent validations (IQ/OQ/PQ). FAT is not only a key milestone in contract fulfillment but also the core verification step for the “suitability” of the equipment. 2. Regulatory and standard requirements ICH Q7: It emphasizes that equipment must undergo Installation Qualification (IQ) and Operational Qualification (OQ), while FAT provides preliminary data support for IQ/OQ. 3. Key Processes and Core Steps of FAT The standard process for FAT includes: 3.1 Plan Development • Content Requirements: The plan must include a title, version number, signature page, system overview, assignment of responsibilities, execution steps, and acceptance criteria. 3.2 Test Execution • Installation Verification: Includes welding inspection, slope verification, pressure testing, etc. • Operation verification: Includes control loop testing, alarm and interlock verification, power failure recovery testing, etc. • Automation system verification: hardware configuration inspection, I/O signal testing, software version control, and functional performance testing. 3.3 Problem Management • Categorized Handling: Issues are classified by severity into critical, non-critical, and improvement items; critical items must be resolved before shipment. • Tracking loop: Manage design changes through change control to ensure that all issues are recorded in the final FAT report. 3.4 Approval and Release • Release Certificate: The project team must sign the FAT release certificate to confirm that the equipment is ready for shipment. 4. Inter-departmental responsibilities and collaboration: The successful implementation of FAT relies on coordination among multiple departments: • Engineering department: Takes charge of protocol development and test execution, as well as technical evaluation. • Quality assurance: Review agreements and reports. • Verification team: Approve the FAT data used for validation to ensure its traceability. • Supplier: Provide equipment documentation (such as material certificates and welding records), assist with testing, and address any issues that arise. 5. Industry Best Practices and Challenges to Address 5.1 Best Practices • Early planning: Specify FAT requirements in the procurement contract (such as testing items and acceptance criteria) to avoid disputes later on. • Simulation testing: Use a simulation environment to conduct preliminary testing on complex automated systems, thereby reducing the risks associated with on-site debugging. 5.2 Common Challenges and Solutions • Challenge 1: Low level of supplier cooperation ◦ Solution: Include penalty clauses in the contract, and hold regular pre-FAT meetings. • Challenge 2: Omitted test items ◦ Solution: Use a standardized checklist. • Challenge 3: Data integrity risks ◦ Solution: Adhere to the ALCOA+ principles, use controlled templates to record raw data, and have it reviewed by QA.