What is the type of testing that occurs after the go-live date to confirm system performance?

The type of testing that occurs after the go-live date to confirm system performance is known as performance evaluation. This phase is critical in the software development and implementation lifecycle as it assesses how well the system operates in a live environment compared to expected benchmarks.

During performance evaluation, various factors such as system speed, responsiveness, stability, and scalability are examined to ensure that the system meets organizational needs and user expectations. This testing is essential for identifying any potential issues that may not have been apparent during earlier stages of testing, ensuring that the system functions optimally in real-world conditions.

User acceptance testing typically occurs before go-live and focuses on whether the end-users accept the system based on their requirements. Functionality testing assesses whether the specific features and functions work as intended, usually in earlier phases. Acceptance testing encompasses both user acceptance and performance evaluation requirements, but the latter specifically is geared towards confirming the system's performance metrics post-launch. Thus, performance evaluation distinctly validates the efficacy and reliability of the system after it is fully operational.