A poor or rushed FAT can lead to missed non conformities, which can only then be corrected after the equipment is installed-which in turn can wreak havoc on a project schedule. The FAT is not a requirement but recommended to be carried out, according to the standard IEC 61511, if the application software of the logic solver is fairly complex or if the architecture of the safety instrumented system is using redundant arrangements.įAT must be conducted in a thorough and forthright manner. The FAT is a customized testing procedure for different types of systems and the tests are executed before the final installation at the plant.

Deviations or abnormalities observed during testing are documented in a problem report and corrected prior to shipment. As the name suggests, this testing is performed at the factory.įAT is typically conducted in order to assess any discrepancies and non-conformities, as well as develop a process for how they are to be handled. FAT ensures that the components and controls are working properly according to the functionality of the equipment itself.

The Factory Acceptance Test (FAT) is a process that evaluates the equipment during and after the assembly process by verifying that it is built and operating in accordance with design specifications.

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