In electronic and electrical business, a schematic diagram is frequently utilised to describe the design of equipment.  Original schematics have been done by hand, using standardized templates or pre-printed adhesive symbols, but today electronic design automation applications (EDA or"electrical CAD") is often utilized.
A design, or schematic diagram, would be a representation of the elements of a system using abstract, graphic symbols as opposed to realistic pictures. A schematic usually omits all details which are not related to the advice the schematic is intended to communicate, and might add unrealistic components that assist understanding. As an instance, a subway map intended for passengers can represent a subway station with a scatter; the dot does not resemble the actual station at all but provides the viewer information without unnecessary visual clutter. A schematic diagram of the chemical process utilizes symbols to represent the valves, ducts, valvesand pumps, and other elements of the system, highlighting their interconnection paths and suppressing physical details. In a digital circuit structure, the design of these symbols may not resemble the design from the circuit. From the schematic diagram, the symbolic components are arranged to be easily interpreted by the viewer.
These tools go beyond simple drawing of connections and devices. Usually they are integrated into the entire IC design flow and also connected to additional EDA tools for verification and simulation of the circuit under design.
In electronic design automation, even until the 1980s schematics were almost the sole formal representation for circuits. More recently, with the advancement of computer technology, other specimens have been introduced and specialized computer languages have been developed, as using the explosive increase of the complexity of electronic circuits, conventional schematics are becoming less functional.
A semi-schematic diagram combines a number of their abstraction of a just schematic diagram with different elements exhibited as realistically as possible, for a variety of factors. It is a compromise between a purely abstract diagram (e.g. the schematic of the Washington Metro) and a completely pragmatic representation (e.g. the corresponding aerial view of Washington).
Schematic diagrams are used widely in repair guides to help users understand the interconnections of parts, and to provide graphical training to help out with dismantling and rebuilding mechanical assemblies. Many motorcycle and automotive repair manuals give a significant number of pages on schematic diagrams.
In electric power systems design, a design drawing referred to as a one-line diagram is often utilised to represent substations, distribution methods as well as whole electrical power grids. These diagrams simplify and compress the facts which would be replicated on each individual phase of a three-phase system, demonstrating only one element instead of three. Electrical diagrams such as switchgear frequently have common device functions designate by standard function amounts.