Reliability Block Diagram (RBD)

The Reliability Block Diagram is a graphical representation which depicts the components of a system as boxes (Black Box). The block diagram comprises an input and an output and in most cases consists of a mixed structure, which can be related to a series or parallel arrangement of the components. The representation normally refers to the functionality of the system. The RBD can be used as a basis for the calculation of the reliability or the availability of the system.

By considering these RBD it becomes further possible to calculate bridge configurations and to take into account several types of failure.