Block diagrams are utilized heavily in design and engineering of diagrams including processes, hardware, applications and electronics. Most commonly, they symbolize theories and systems at a greater level, less thorough summary. The diagrams are useful for troubleshooting technical difficulties.
Block diagrams are a generalized representation of a theory and are not meant to display complete information in relation to design or manufacture. Contrary to schematics, blueprints and layout diagrams, block diagrams do not portray the essential detail for physical construction. Block diagrams are made easy so as to not cloud theories.
The simplification in block diagrams can also be helpful when demonstrating an idea, but concealing the inner workings of potentially confidential intellectual property (IP). Top-down design in electrical technology often progresses through progressively detailed block diagrams. Block diagrams in procedure control reveal the purposes of operations but not the components that play them. The functions of block diagrams may then be executed with programmable logic controls (PLC).
An entity relationship diagram (ERD), one instance of a block structure, represents an advice system by showing the relationships between individuals, objects, locations, events or theories inside that system. (See a picture over the ERD definition site.)
Block diagrams are also utilised in a context. In the analysis of biology, as an example, block diagrams have been used to display biological functions and interrelations.