In electrical and electronic industry, a design diagram is often utilised to describe the plan of gear.  Initial schematics have been done by hand, using standardized templates or off-the-shelf adhesive symbols, but today electronic design automation software (EDA or"electrical CAD") can be used.
In electrical power systems design, a schematic drawing called a one-line diagram is often used to represent substations, distribution systems as well as whole electric power grids. These diagrams compress and simplify the details that would be replicated on each phase of a three-phase system, demonstrating only 1 component instead of three. Electrical diagrams such as switchgear frequently have common device functions designate by regular function amounts.
A semi-schematic diagram unites some of the abstraction of a just schematic diagram with different components exhibited as realistically as you can, for various factors. It's a compromise between a purely subjective diagram (e.g. the schematic of the Washington Metro) and an exclusively pragmatic representation (e.g. the corresponding aerial view of Washington).
A design, or schematic diagram, is a representation of the elements of a system using abstract, picture symbols as opposed to realistic images. A schematic usually omits all details which aren't related to the advice the schematic is intended to convey, and may add unrealistic components that aid comprehension. By way of instance, a subway map intended for passengers can represent a subway station using a dot; the scatter doesn't resemble the true station at all but gives the viewer info without unnecessary visual clutter. A schematic diagram of this chemical procedure uses symbols to represent the valves, ducts, valvesand pumps, and other equipment of the system, highlighting their interconnection controlling and paths physical specifics. In a digital circuit diagram, the layout of the symbols might not resemble the layout in the circuit. In the design diagram, the symbolic components are arranged to be more easily interpreted by the viewer.
These instruments go beyond easy drawing of devices and connections. Usually they are incorporated into the whole IC design flow and linked to additional EDA tools for verification and simulation of this circuit under design.
Schematic diagrams are used widely in repair manuals to help users understand the interconnections of parts, and also to offer graphical instruction to help out with dismantling and rebuilding mechanical assemblies. Lots of automotive and motorcycle repair manuals devote a substantial number of webpages into schematic diagrams.
In electronic design automation, before the 1980s schematics were the only formal representation for circuits. More recently, together with the advancement of computer technologies, other representations have been introduced and technical computer languages were developed, as using all the explosive rise of the complexity of digital circuits, traditional schematics are becoming less practical. By way of example, hardware description languages are crucial for modern digital circuit design.