A block diagram is a visual representation of a system which utilizes simple, labeled cubes which represent single or multiple objects, concepts or entities, connected with lines to show relationships between these. An entity relationship diagram (ERD), 1 example of a block structure, represents an info system by showing the relationships between individuals, objects, locations, events or theories within that system. (See a picture in the ERD definition page.)
Contrary to schematics, blueprints and design diagrams, block diagrams do not portray the essential detail for physical construction. Block diagrams are made simple so as not to cloud concepts.
Block diagrams can also be utilised in a scientific context. In the analysis of biology, by way of example, block diagrams have been utilized to display biological functions and interrelations.
Block diagrams are used heavily in design and engineering of diagrams such as procedures, hardware, software and electronics. Most frequently, they symbolize theories and systems in a higher level, less detailed summary. The diagrams are helpful for troubleshooting technical issues.
The simplification in block diagrams may also be useful when demonstrating a notion, but concealing the inner workings of possibly key intellectual property (IP). Top-down layout in electrical technology often progresses through increasingly detailed block diagrams. Block diagrams in procedure control show the functions of surgeries but not the elements that do them. The functions of block diagrams can then be implemented using programmable logic controls (PLC).