Equivalence partitioning is a black-box test technique that divides the input domain of a system into partitions of equivalent data. Boundary value analysis is a technique that tests the boundaries of these partitions, where errors are more likely to occur. These techniques are suitable for testing the processing functionality of a critical traffic control system, as they can ensure that the system handles the input variables within the defined ranges and detects any invalid or out-of-range values. References = Black Box Testing Techniques: A Comprehensive Guide (Section 5.1 and 5.2), ISTQB Certified Tester Advanced Level Syllabus Technical Test Analyst (Section 3.2.1 and 3.2.2)