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Control testing is a type of testing that specifically focuses on assessing the effectiveness of controls in place to mitigate risks associated with system operations. This approach involves evaluating the procedures and mechanisms designed to ensure that the system operates as intended, thereby minimizing the likelihood of errors and failures that could lead to significant risk.

By systematically verifying the implementation and operation of these controls, control testing helps organizations determine whether they can rely on their systems to function properly and securely. This not only gives stakeholders confidence in the system but also ensures compliance with regulatory requirements or internal policies aimed at risk management.

Other testing types, like functional testing, primarily focus on verifying that the application behaves according to specified requirements. White box testing looks into the internal workings of an application, assessing code logic and structure rather than controlling the risk mitigation processes directly. Error handling primarily ensures the system responds appropriately to errors, but it doesn’t address broader risk management issues like control testing does. Therefore, control testing is essential for reducing system risk to an acceptable level through established procedures.