A Factory Acceptance Test (FAT) is a systematic and thorough evaluation process that occurs at a manufacturer’s facility before a piece of equipment is delivered to the client. The primary objective of FAT is to ensure that the equipment meets the desired functionality, technical specifications, and design requirements outlined by the client.
The Importance of Factory Acceptance Testing
Factory Acceptance Testing plays a vital role in identifying and addressing potential issues before the equipment is installed on-site. This process minimizes costly downtime, improves equipment suppliers’ accountability, and ensures high-quality and reliable products. Adequate factory testing helps clients fully assess machine performance and validate whether the equipment meets their requirements.

Types Factory Acceptance Test
There are various types of factory acceptance tests that cater to different industries and equipment types, including:
Mechanical FAT
Electrical FAT
Control System FAT
Software FAT
Factory Acceptance Test Procedure
The FAT procedure involves the following steps:
Reviewing as built technical drawings
Developing a detailed test plan
Conducting tests based on the test plan
Analyzing test results
Ensuring equipment compliance with standards
What Happens During Factory Acceptance Test?
During the FAT, both the production volume and equipment performance are assessed by performing a series of tests, including process schemes and simulations. These tests help evaluate if the equipment meets the client’s requirements and if any modifications are necessary. The FAT also involves the creation of a factory acceptance test checklist, which is a comprehensive list of items to be inspected and verified during the testing process.
The FAT Checklist
The factory acceptance test checklist typically includes:
Visual inspection
Functional testing
Performance testing
Safety and compliance checks
Documentation review

Example of a Factory Acceptance Test
An example of a factory acceptance test could be the testing of an industrial mixer for a food processing plant. In this case, LotusWorks, a renowned engineering and technical services provider, could be involved in the FAT process. They would ensure that the mixer meets the required performance standards, complies with safety regulations, and operates according to the client’s specifications.
Role of LotusWorks in FAT
LotusWorks provides professional engineering and technical services, assisting clients throughout the factory acceptance testing process. Their expertise in FAT testing ensures that the equipment is thoroughly evaluated and meets the desired functionality and performance requirements.
Factory Acceptance Test Standard
LotusWorks provides professional engineering and technical services, assisting clients throughout the factory acceptance testing process. Their expertise in FAT testing ensures that the equipment is thoroughly evaluated and meets the desired functionality and performance requirements.
ISO 9001 – Quality Management Systems
IEC 60068 – Environmental Testing
IEC 61010 – Safety Requirements for Electrical Equipment
FAT Protocal
A Factory Acceptance Test protocol is a comprehensive document that outlines the testing procedures, acceptance criteria, and performance requirements for the equipment under test. The protocol serves as a roadmap for both the client and equipment suppliers, ensuring that the tests are performed consistently and accurately. The FAT protocol includes the following components:
Test objectives
Test scope
Test methods and procedures
Acceptance criteria
Test equipment and tools
Test schedules and timelines

As Built Technical Drawings
As built technical drawings are essential components of the FAT process. These drawings provide detailed information about the equipment’s design, construction, and assembly. They are crucial for verifying that the equipment has been built according to the client’s specifications and design requirements.
Detailed Test Plan
detailed test plan is a document that outlines the testing procedures and acceptance criteria for each test conducted during the FAT. It serves as a guide for the testing team, ensuring that each test is performed systematically and consistently. The test plan typically includes:
Test objectives
Test scope
Test methods and procedures
Acceptance criteria
Test equipment and tools
Test schedules and timelines
Comparing Factory and Site Acceptance Tests
While Factory Acceptance Tests are conducted at the manufacturer’s facility, Site Acceptance Tests (SAT) are performed at the client’s location after the equipment has been installed. SAT helps ensure that the equipment operates correctly within its intended environment and integrates seamlessly with existing systems. Over test equipment reliability is an essential aspect of both FAT and SAT, as it ensures that the equipment functions as intended in real-world conditions.
The Benefits of Adequate Factory Testing
Adequate factory testing provides numerous benefits, including:
Minimizing costly downtime due to equipment malfunction
Ensuring equipment compliance with industry standards
Reducing the risk of compromised test validity
Building trust and confidence between clients and equipment suppliers
Guaranteeing the equipment’s desired functionality and performance
Ensuring Desired Functionality
By conducting comprehensive FAT tests, clients can ensure that the equipment meets their specific requirements and performs as expected. This process allows clients to identify and address any issues before the equipment is installed, preventing costly delays and downtime.
Avoiding Compromised Test Validity
Thorough FAT testing helps avoid compromised test validity, ensuring that the equipment is evaluated accurately and consistently. It allows clients to make informed decisions about the equipment’s suitability for their needs.
Conclusion
Factory Acceptance Tests are crucial to ensuring that equipment meets the desired functionality, technical specifications, and design requirements outlined by the client. The FAT process helps minimize downtime, improve supplier accountability, and guarantee high-quality and reliable products. By following the guidelines and standards for factory acceptance testing, clients can enjoy the benefits of high-performing equipment that meets their unique needs.
FAQ
The primary purpose of a Factory Acceptance Test is to ensure that the equipment meets the desired functionality, technical specifications, and design requirements outlined by the client before being delivered and installed
A Factory Acceptance Test is conducted at the manufacturer’s facility, while a Site Acceptance Test is performed at the client’s location after the equipment has been installed. Site Acceptance Test (SAT) ensures that the equipment operates correctly within its intended environment and integrates seamlessly with existing systems.
LotusWorks provides professional engineering and technical services, assisting clients throughout the factory acceptance testing process. Their expertise in FAT testing ensures that the equipment is thoroughly evaluated and meets the desired functionality and performance requirements.
Factory Acceptance Test protocol typically includes test objectives, test scope, test methods and procedures, acceptance criteria, test equipment and tools, and test schedules and timelines.
Adequate factory testing is important because it helps minimize costly downtime, ensures equipment compliance with industry standards, reduces the risk of compromised test validity, builds trust and confidence between clients and equipment suppliers, and guarantees the equipment’s desired functionality and performance.