A Practical Guide to SysML, 2nd Edition

13.4 Types of Requirements Relationships

SysML includes specific relationships to relate requirements to other requirements as well as to other model elements. These include relationships for defining a requirements hierarchy, deriving requirements, satisfying requirements, verifying requirements, refining requirements, and copying requirements.

Table 13.2 summarizes the specific relationships, which are discussed later in this chapter. The derive, and copy relationships can only relate one requirement to another. The satisfy, verify, refine, and trace relationships can relate requirements to other model elements. Containment can be used to relate a requirement to another requirement, or to another namespace like a block or a package.

Table ...