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Supplement 3 is an application guide for general testability. Supplement 3 is applicable to products of any technology. This Supplement 3 is an application guide for determination of default values for MTBF (Mean Time Between Failures) and failure rates of systems and components associated with the DIN EN 60706-5 and VG 95287 standards. The committee responsible for this standard is NA 140-00-18 AA "Prüfbarkeit von elektrischen/elektronischen Gerätesätzen" ("Testability of electrical/electronical products") of the Electrical Engineering Standards Committee (NE) at DIN.