An entity relationship diagram (ERD), one instance of a block diagram, represents an info system by demonstrating the relationships between humans, objects, locations, concepts or events inside that system. (See a picture over the ERD definition page.)
Block diagrams are utilized heavily in design and engineering of diagrams such as applications, hardware, electronic equipment and processes. Most commonly, they symbolize concepts and systems in a greater level, less thorough overview. The diagrams are helpful for troubleshooting technical problems.
Block diagrams are utilized in a scientific context. In the analysis of mathematics, as an instance, block diagrams are used to show biological functions and interrelations.
The simplification in block diagrams can also be useful when demonstrating a notion, but hiding the inner workings of possibly confidential intellectual property (IP). Top-down layout in electrical engineering frequently progresses through progressively detailed block diagrams. After enough detail is inserted through iterations, the block structure becomes a schematic. Block diagrams in process control reveal the purposes of surgeries but not the components that play them. The functions of block diagrams can then be implemented with programmable logic controllers (PLC).
Contrary to schematics, blueprints and design diagrams, block diagrams do not portray the essential detail for bodily structure. Block diagrams are created easy in order to not cloud concepts.