Browse Definitions :
Definition

block diagram

A block diagram is a visual representation of a system that uses simple, labeled blocks that represent single or multiple items, entities or concepts, connected by lines to show relationships between them. An entity relationship diagram (ERD), one example of a block diagram, represents an information system by showing the relationships between people, objects, places, concepts or events within that system. (See an image on the ERD definition page.)

Block diagrams are used heavily in engineering and design of diagrams for electronics, hardware, software and processes. Most commonly, they represent concepts and systems in a higher level, less detailed overview. The diagrams are useful for troubleshooting technical issues. 

Block diagrams are a generalized representation of a concept and are not intended to display complete information in regards to design or manufacture. Unlike schematics, blueprints and layout diagrams, block diagrams do not portray the necessary detail for physical construction. Block diagrams are made simple so as not to cloud concepts. 

The simplification in block diagrams can also be useful when demonstrating an idea, but concealing the inner workings of potentially secret intellectual property (IP). Top-down design in electrical engineering often progresses through increasingly detailed block diagrams. After enough detail is added through iterations, the block diagram becomes a schematic. Block diagrams in process control show the functions of operations but not the components that perform them. The functions of block diagrams may then be implemented with programmable logic controllers (PLC).

Block diagrams are also used in a scientific context. In the study of biology, for example, block diagrams are used to display biological functions and interrelations.

This was last updated in December 2017

Continue Reading About block diagram

SearchCompliance
  • OPSEC (operations security)

    OPSEC (operations security) is a security and risk management process and strategy that classifies information, then determines ...

  • smart contract

    A smart contract is a decentralized application that executes business logic in response to events.

  • compliance risk

    Compliance risk is an organization's potential exposure to legal penalties, financial forfeiture and material loss, resulting ...

SearchSecurity
  • biometric verification

    Biometric verification is any means by which a person can be uniquely identified by evaluating one or more distinguishing ...

  • password

    A password is a string of characters used to verify the identity of a user during the authentication process.

  • biometrics

    Biometrics is the measurement and statistical analysis of people's unique physical and behavioral characteristics.

SearchHealthIT
SearchDisasterRecovery
  • What is risk mitigation?

    Risk mitigation is a strategy to prepare for and lessen the effects of threats faced by a business.

  • change control

    Change control is a systematic approach to managing all changes made to a product or system.

  • disaster recovery (DR)

    Disaster recovery (DR) is an organization's ability to respond to and recover from an event that affects business operations.

SearchStorage
  • PCIe SSD (PCIe solid-state drive)

    A PCIe SSD (PCIe solid-state drive) is a high-speed expansion card that attaches a computer to its peripherals.

  • VRAM (video RAM)

    VRAM (video RAM) refers to any type of random access memory (RAM) specifically used to store image data for a computer display.

  • virtual memory

    Virtual memory is a memory management technique where secondary memory can be used as if it were a part of the main memory.

Close