Creating a derive reqt relationship on a requirement diagram (SysML)
This topic provides information for creating a derive reqt through a Requirement Diagram. For information about creating derive reqt through a Modeler pane, click here 
.
.To create a derive reqt relationship on a requirement diagram:
1. Add the two Requirements to the Requirement Diagram. How?
2. On the diagram's tab, click the 
Derive Reqt button.
Derive Reqt button.3. Click the derived Requirement, and then click the Requirement from which the Requirement you first clicked is derived.
Note that you can create Derive Reqt relationships between Requirements through an appropriate pane. For more information, click here