Digital Systems Testing & Testable Design

Testing of a system is an experiment in which the system is exercised and its resulting response is analyzed to ascertain whether it behaved correctly. If incorrect behavior is detected, a second goal of a testing experiment may be to diagnose, or locate, the cause of the misbehavior. Diagnosis assumes knowledge of the internal structure of the system under test. These concepts of testing and diagnosis have a broad applicability; consider, for example, medical tests and diagnoses, test-driving a car, or debugging a computer program.