The simplification in block diagrams may also be useful when demonstrating a notion, but hiding the internal workings of potentially confidential intellectual property (IP). Top-down design in electrical engineering often progresses through progressively detailed block diagrams. Block diagrams in procedure control reveal the purposes of operations but not the elements that execute them. The functions of block diagrams can then be executed using programmable logic controllers (PLC).
A block diagram is a visual representation of a system that utilizes simple, labeled blocks which represent single or several items, concepts or entities, connected by lines to show relationships between these. An entity relationship diagram (ERD), one instance of a block diagram, represents an information system by showing the relationships between individuals, objects, places, concepts or events within that system. (See a picture over the ERD definition webpage.)
Block diagrams are used in design and engineering of diagrams including procedures, hardware, software and electronic equipment. Most frequently, they signify concepts and systems at a greater level, less comprehensive overview. The diagrams are useful for troubleshooting technical difficulties.
Block diagrams are a generalized representation of a theory and aren't meant to display comprehensive information in relation to manufacture or design. Contrary to schematics, blueprints and design diagrams, block diagrams don't portray the essential detail for physical construction. Block diagrams are created simple in order to not cloud theories.
Block diagrams are also used in a context. In the study of math, as an example, block diagrams are utilised to display biological functions and interrelations.