Ability to isolate malfunctions of complete multiple integrated systems consisting of closely interrelated fire control, bombing-navigation, flight control, countermeasures or similar systems and to determine the methods of repair where extremely complex relationships exist among numerous interconnected units and control circuits not only within the individual control systems but between them as well, requiring complete knowledge of all electronic, mechanical, and or optical systems and units. Knowledge of electronics, software-controlled test stations and their peripherals, test results, a variety of test equipment, self-test programs and technical data containing schematic diagrams, signal and data diagrams, test procedures, program information, and mathematical formulas to identify and isolate malfunctions and determine if a malfunction is in the program, the UUT, Pod or the test station.