In electronic and electrical sector, a design diagram is often utilized to refer to the design of equipment.  Original schematics have been done by hand, using standardized templates or off-the-shelf glue symbols, however today electronic design automation software (EDA or"electrical CAD") is often used.
A semi-schematic diagram combines some of the abstraction of a purely schematic diagram along with different components displayed as realistically as possible, for various factors.
In electric power systems layout, a schematic drawing referred to as a one-line diagram is often utilized to represent substations, distribution systems as well as entire electrical power grids. These diagrams simplify and compress the details that would be repeated on each phase of a three-phase method, demonstrating just one component rather than three. Electrical diagrams such as switchgear frequently have common device functions designate by standard function numbers.
A schematic, or schematic diagram, would be a representation of the components of a system using abstract, graphic symbols instead of realistic pictures. A schematic generally communicates all details that aren't relevant to the data the schematic is intended to communicate, and may add unrealistic components that aid comprehension. As an example, a subway map intended for passengers may represent a subway station with a dot; the dot does not resemble the true station at all but provides the viewer information without unnecessary visual clutter. A schematic diagram of a compound process uses symbols to represent the vessels, piping, valves, pumps, and other equipment of the system, emphasizing their interconnection controlling and paths physical information. In an electronic circuit design, the design of these symbols might not resemble the layout in the circuit. In the design diagram, the emblematic elements are organized to be more easily interpreted by the viewer.
In electronic design automation, until the 1980s schematics were practically the sole proper representation for circuits. More recently, with the progress of computer technology, other specimens have been introduced and technical computer languages have been developed, because using all the explosive increase of the complexity of digital circuits, traditional schematics are becoming less practical.
Schematic diagrams have been used widely in repair manuals to help users understand the interconnections of parts, and to give graphical training to help out with rebuilding and simplifying mechanical assemblies. Lots of automotive and motorcycle repair manuals devote a substantial number of webpages into schematic diagrams.
These tools go beyond easy drawing of connections and devices. Usually they are incorporated into the whole IC design flow and also linked to additional EDA tools for verification and simulation of this circuit under design.