Block diagrams are used heavily in engineering and design of diagrams including applications, hardware, electronics and procedures. Most commonly, they signify theories and systems at a higher level, less comprehensive overview. The diagrams are helpful for troubleshooting technical issues.
A block diagram is a visual representation of a system which uses simple, labeled cubes that represent single or multiple objects, concepts or entities, connected by lines to show relationships between them. An entity relationship diagram (ERD), one instance of a block diagram, represents an advice system by showing the relationships between humans, objects, locations, concepts or events within this system. (See a picture on the ERD definition site.)
Block diagrams can also be utilised in a context. In the analysis of math, as an example, block diagrams have been utilised to show biological functions and interrelations.
The simplification in block diagrams can also be helpful when demonstrating a notion, but concealing the inner workings of potentially secret intellectual property (IP). Top-down layout in electrical engineering often progresses through increasingly detailed block diagrams. Block diagrams in process control reveal the functions of surgeries but not the elements that play them. The purposes of block diagrams may then be executed using programmable logic controllers (PLC).
Unlike schematics, blueprints and layout diagrams, block diagrams don't portray the essential detail for bodily construction. Block diagrams are made easy so as not to cloud theories.