3. Taking dependencies into account, dynamic ADDs

3.1 General considerations on addiction

The preceding developments assume that the primary events of the ADD evolve independently of each other. However, in reality, this assumption is often not respected due to the limited number of maintenance teams, the existence of common cause failures (leading to the simultaneous failure of several components), sequential aspects (the order of occurrence of failures changes what happens at system level), etc. On the other hand, the extent of these dependencies may be limited to a few leaves (primary events) or concern many leaves (primary events). On the other hand, the extent of these dependencies may be limited to a few leaves (primary events) or concern many leaves. They may even affect all the leaves in the tree, as we have seen with reliability...