Requirement Diagram Example: HSUV Requirements

The best way to understand Requirement Diagram is to look at some examples of Requirement Diagram and start drawing your own. You can now modify the Requirement Diagram example below using Visual Paradigm's online Requirement Diagram tool.

Modeling Requirements with SysML

Effective identification and management of requirements can lead your project to a success. The SysML tool features a SysML requirement diagram tool that provides a visual approach in representing and managing system requirements.

In a requirement diagram, requirements are shown as blocks, with relationship connectors in between, illustrating the derivation, dependency and grouping of requirements. There are 6 requirement relationships: These help track traceability.

  • Containment package is like namespace that contains other elements in the model hierarchy. Requirements can only contain other requirements. In requirements diagram, use same notations as package diagrams: crosshair notation and qualified name string notation. (no nesting notation because requirements don't have graphical compartments)
  • Trace requirement indicates that modification to the supplier element may impact the client element
  • Derive requirement indicates that the client element requirements derived from supplier, and as such, changes at one level could impact entire chain of derived requirements. This relationship requires that there are requirements on both ends.
  • Refine requirement indicates that the requirement at the client element is more concrete (less abstract) than that of the supplier end. Offers clarity at the client end.
  • Satisfy requirement asserts that the client end will fulfill the requirement at the supplier end. But this does not constitute proof, as this comes from the test cases. The rule is that the supplier end must have a requirement but no rules for client end but it's usually a block.
  • Verify requirement states that the client end verifies the supplier end requirement, which is usually done through a test case. So the supplier end must have a requirement and the client end has a test case.

How to create a Requirement Diagram?

Requirement Diagram can be easily created using a professional Requirement Diagram software like Visual Paradigm Online:

  1. Create a new Requirement Diagram.
  2. The stencil provides a rich set of Requirement Diagram symbols you need to construct your diagram. Just drag and drop the symbols you need to your diagram and connect them with connector lines.
  3. When you finished, you can save the diagram (File > Save as) to our cloud repository for future access. You can also export your work into image (JPG, PNG, PDF, SVG, etc) and share it with your friends or co-workers.

Requirement Diagram Tool in SysML

Visual Paradigm's SysML feature provides all 9 type of diagrams as shown below, including requirement diagram that allows you to define your own requirement types, with user-defined properties and appearance, and to produce a list of requirement to Excel for external manipulation. Import the file back for updating.

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