The ReliabilityBlockDiagram(RBD) is used to identify potential areas of poor reliabilityand where improvements can be made to lower the failure rates for the equipment. This method can be used in both the design and operational phase to identify poor reliabilityand provide targeted improvements. Understanding the Reliability Block Diagram Is this answer helpful?Thanks!Give more feedbackThanks!How can it be improved?How can the answer be improved?Tell us how Understanding the Reliability Block Diagram There is much different analysis available to perform the analysis, but a relatively simple and widely accepted approach is the Reliability Block Diagram. Reliability Block Diagram The Reliability Block Diagram (RBD) is used to identify potential areas of poor reliability and where improvements can be made to lower the failure rates for the equipment. Block Diagram in Excel | Design Systems Reliability - depicts the effect of a component failure on the system's function. To Create a Block Diagram. Lay out a diagram of parallel and serial components; Identify probability of failure of each component (value 0-1). Calculate parallel probabilities. (a+b-a*b) Multiply serial component probabilities (a*b) Use parallel parts to increase reliability.