API Support

Modified Condition Decision Coverage is a strict code coverage criterion that verifies the logical correctness of complex decision-making code by ensuring every individual condition within a decision is shown to independently influence the final outcome. Instead of simply checking whether lines or branches of code are executed, MC/DC requires test cases to demonstrate that changing a single boolean condition—while keeping all other conditions constant—can alter the decision result. This provides far deeper assurance that conditional logic behaves as intended under all meaningful scenarios.

Because of this precision, Modified Condition Decision Coverage plays a critical role in validating software where failures can have serious consequences. Industries such as aerospace, automotive, medical devices, and defense rely on MC/DC to detect subtle logical defects that basic coverage metrics often overlook, and regulatory standards like DO-178C and ISO 26262 explicitly mandate its use. By enforcing disciplined test design and minimizing logical ambiguity, MC/DC helps teams build high-confidence, reliable systems while maintaining control over test complexity and long-term maintainability.