Block diagrams are used in engineering and design of diagrams such as hardware, electronic equipment, applications and processes. Most commonly, they symbolize concepts and systems in a greater level, less thorough summary. The diagrams are helpful for troubleshooting technical issues.
A block diagram is a visual representation of a system which uses simple, labeled cubes which represent single or several objects, concepts or entities, connected by lines to show relationships between these. An entity relationship diagram (ERD), one example of a block structure, represents an information system by demonstrating the relationships between humans, objects, locations, concepts or events within this system. (See a picture in the ERD definition page.)
The simplification in block diagrams can also be helpful when demonstrating a notion, but hiding 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 procedure control show the functions of operations but not the components that execute them. The functions of block diagrams can then be implemented with programmable logic controls (PLC).
Contrary to schematics, blueprints and design diagrams, block diagrams do not portray the essential detail for bodily construction. Block diagrams are created simple so as to not cloud concepts.
Block diagrams are used in a scientific context. In the study of mathematics, by way of instance, block diagrams can be utilised to display biological functions and interrelations.