Specification and Description Language (SDL) Diagrams are used to show the specifics
of a process. It also uses many different nodes to show more detail in the process.
SDL diagrams are made up of the system definition, blocks, and process. A system must
be applied first and then blocks can be used to represent parts of the system and
other nodes to identify the steps taken.
SDL diagrams are best used when a system must be analyzed in great detail. They are meant
to show every single step of a process and aren't as useful when broad overview is desirable.
- Identify the process. Determine which process is to be diagrammed using the SDL system.
- Start the diagram. A rounded rectangle represents the beginning of a SDL diagram, although there are many variations that can mean different types of starts. Creating the diagram can be made quick and easy using the SDL Diagram template offered by SmartDraw.
- Add more nodes. To show a process, use a rectangle. Triangles and hexagons represent decisions, polygons in the shape of arrows symbolize messages, rectangles with a wavy bottom are documents, etc. There are many different symbols that represent different steps of a process.
- End the process. Use another rounded rectangle to end the system.
- Verify accuracy. Consult with other members of your team or company to confirm that all of your details are accurate.