This domain has some characteristics similar to the requirements domain.
However, the main difference is that the acceptance criteria have a greater focus on performance testing business rules, with an approach more focused on the results and metrics that must be collected, while the requirements domain looks at the application to be tested and lists the features to be tested.

The main activities in this domain involve identify the response time, throughput, and resource utilization goals and constraints.
In general, response time is a user concern, throughput is a business concern, and resource utilization is a system concern.
Additionally, identify project success criteria that may not be captured by those goals and constraints; for example, using performance tests to evaluate what combination of configuration settings will result in the most desirable performance characteristics.