Who is ultimately responsible for identifying the class of an assembly?

The customer is ultimately responsible for identifying the class of an assembly because they are the one defining their specific requirements and expectations for the product. In the context of IPC-A-610, different classes of assemblies are associated with varying levels of quality and performance. The customer selects the appropriate class based on the application of the electronic assembly, such as whether it will be used in a critical function in aerospace or a more general application.

By communicating their needs clearly, the customer ensures that the product will meet specific performance criteria and compliance standards. This responsibility is significant because it impacts the design, manufacturing process, and ultimately the reliability and safety of the final product. The other participants in the process, such as the supplier, engineer, and tester, may provide input or support in the identification process, but the final determination rests with the customer, who has the most comprehensive understanding of the intended use and requirements.