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The startup element for the satisfy relationship can be any arbitrary model
element. Naturally, it makes sense to use a comprehensive element of the design
(i.e., a package or block). On a level with too fi ne granularity the cost of modeling
would exceed the benefi t.
The notation deviates from the standard notation for UML realization . SysML
uses the notation as a dashed arrow with normal arrowhead and the keyword
?«satisfy?» ( Figure 4.8 ).
It is not always meaningful to explicitly draw the relationship in the diagram.
Figure 4.9 shows the same scenario from Figure 4.8 . We normally don ??™ t represent
the elements all together in one diagram when we use this notation. 2
232 CHAPTER 4 SysML??”The Systems Modeling Language
The satisfy relationship does not state whether the requirement is satisfi ed in
full or only in part. You can easily add this information by using a comment or a
stereotype. If a requirement is satisfi ed by several design elements, then you can
express this alternatively by using one single relationship.


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