Which of the following is NOT a typical focus area in user acceptance testing?

User Acceptance Testing (UAT) primarily concentrates on ensuring that the system meets the requirements and needs of the end-users. This process typically focuses on user interaction with the system, validating daily activities and functionalities, and ensuring that the system produces expected results based on current operational data.

In UAT, the primary objective is to validate whether the solution aligns with the business requirements and to ensure that end-users can interact with the system comfortably and effectively. Therefore, assessment of user interactions, day-to-day functionalities, and any fluctuations in historical data are some of the core areas evaluated during this testing phase.

Conversely, while system performance under load is an important aspect of overall software testing, it is typically addressed in performance testing instead of UAT. Performance testing assesses how well the system performs under various conditions, including high traffic loads or processing demands, to ensure it operates efficiently before the product goes live. Hence, focusing on system performance does not align with the primary goals of user acceptance testing.