1. An introduction to the system with a Reliability Block Diagrams (RBD) or Fault Trees (FTA) (see in 2.3.2 Reliability)The Reliability Block Diagrams (RBD) or Fault Trees (FTA) (Block Diagram) shall explain the functional operation of the Goods down to its sub-equipment level. Block diagrams shall show the functional relationships of the sub-equipment. Descriptive text must cover the purpose as well as outputs and inputs of each component of the Block Diagram. The level of detail shall match on the content of the block diagram.2. A description of each component, or function, in the Reliability Block Diagrams (RBD) or Fault Trees (FTA) (Block Diagram).The description of each Goods’ sub-equipment shall detail the functional operation at sub-equipment level or component level. Block Diagrams shall show the functional relationships between sub-equipment assemblies and components. Purpose, inputs, and outputs of each assembly, subassembly, and component must be discussed.