This describes Load Testing: subjecting the system to varying workloads (increasing numbers of users, transactions, or data volume) to measure performance behavior and confirm the system continues functioning correctly under each load level. Integration Testing checks interaction between components/modules, not workload variation. System Testing validates the complete system's functional/non-functional requirements broadly, not specifically workload scaling. Usability Testing evaluates ease of use for end users, unrelated to performance under load. Load testing is the standard term for this workload-scaling performance evaluation.