Why is it necessary to conduct scalability testing in RSI Phase 5?

Conducting scalability testing is essential in RSI Phase 5 because it specifically focuses on evaluating how a system performs under increased loads and how well it can accommodate growth over time. This type of testing helps to determine the limits and capabilities of a system when faced with varying numbers of users or transactions. As organizations evolve and their user base grows, ensuring that the system can effectively manage this growth without performance degradation is critical. Scalability testing verifies that the infrastructure and architecture are robust enough to support future demands, which is vital for maintaining performance levels and ensuring user satisfaction as the system scales.

While other aspects like security vulnerabilities, compliance with regulations, and user satisfaction are important for the overall quality of the system, they do not directly address the core intention of scalability testing, which is to assess how well a system can grow and handle increased operational demands. This focus on capacity is what distinguishes scalability testing as a necessary component in the later phases of system development and evaluation.