The simplification in block diagrams can also be helpful when demonstrating an idea, but concealing the internal workings of possibly key intellectual property (IP). Top-down design in electrical engineering often progresses through progressively detailed block diagrams. Block diagrams in process control show the purposes of operations but not the components that execute them. The functions of block diagrams can then be executed using programmable logic controls (PLC).
Unlike schematics, blueprints and design diagrams, block diagrams do not portray the necessary detail for physical structure. Block diagrams are made easy so as to not cloud theories.
Block diagrams are also utilised in a scientific context. In the study of Science, as an example, block diagrams are utilized to show biological functions and interrelations.
An entity relationship diagram (ERD), one example of a block structure, represents an information system by showing the relationships between people, objects, locations, concepts or events within this system. (See an image in the ERD definition webpage.)
Block diagrams are utilized in design and engineering of diagrams for hardware, electronic equipment, software and procedures. Most commonly, they represent concepts and systems in a higher degree, less detailed summary. The diagrams are helpful for troubleshooting technical problems.