The causes for the failure of materials and components should be uncovered by failure analysis. The resulting findings form the basis of targeted measures for the damage remedy and prevention. One of the main tasks of failure analysis is the selection of appropriate examination procedures and the scientifically based and comprehensive evaluation of the results. Therefore, the standard defines terms, designates and describes types of damage consistently, enabling the systematic procedure for a failure analysis and ensuring the comparability of the results of various investigative bodies. The standard describes the different types of failures, the failure symptoms, the causes of failures and failure processes in case of welded metal products.