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Conventional approval requirements exclusively ask for minimum strength values, which have to be met. The probabilistic approach estimates how likely none of the comparatively manufactured units fails during operation.
Both questions are juxtaposed and compared here with respect to the load cycle tests. The influence of the sample sizes is discussed additionally.
This presentation mentions the most important safety items that should be improved from the perspective of Germany.
These are the improvement of the understanding and definition of term "safety", the agreement on procedures for the measurement of safety and the issue of degradation in combination with the safety level to be ensured until end of life.
For using probabilistic experience for the whole production adequate measures for surveillance of the production should additionally become mandatory to be taken into account.
The essential aspects of these issues are shortly explained and highlighted by especially aspects of the slow burst testing with respect to non-cycle fatigue sensitive designs and the hint on the general scatter of properties (Monte-Carlo simulation).