An entity relationship diagram (ERD), one example of a block structure, represents an information system by demonstrating the relationships between people, objects, locations, events or theories inside this system. (See an image in the ERD definition page.)
Block diagrams are utilized heavily in engineering and design of diagrams including applications, hardware, electronics and processes. Most frequently, they signify concepts and systems at a greater level, less comprehensive summary. The diagrams are helpful for troubleshooting technical issues.
The simplification in block diagrams may also be helpful when demonstrating an idea, but concealing the inner workings of potentially secret intellectual property (IP). Top-down design in electrical engineering often progresses through progressively detailed block diagrams. Block diagrams in procedure control reveal the functions of operations but not the elements that execute them. The purposes of block diagrams can then be executed using programmable logic controls (PLC).
Block diagrams are a generalized representation of a theory and are not meant to display comprehensive information in regards to manufacture or design. Contrary to schematics, blueprints and design diagrams, block diagrams don't portray the necessary detail for bodily structure. Block diagrams are created simple so as to not cloud concepts.
Block diagrams are also utilized in a scientific context. In the study of math, for instance, block diagrams have been utilised to display biological functions and interrelations.