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In usage stress testing, the previously defined usage cases should be applied to the device in increasingly faster sequences to evaluate the capability of the software response timing to keep up with highly dynamic usage conditions. The objective of the SW stress test is to determine the robustness of software by testing it well beyond the limits of normal operation. Stress testing is particularly important for mission‐critical software but is used for all types of software. Software stress tests emphasize robustness, availability, and error handling under a heavier load than would be considered correct behavior under normal circumstances. Stress testing tries to break the system under test by overwhelming its resources or by taking resources away from it. The primary purpose is to make sure that the software can deal with system overload fails and recover gracefully – this ability is known as recoverability.