5.5 Contribution Links

Contribution Links, which are covered in this section, are: Make, Some+, Help, Break, Some-, Hurt, Unknown, And, and OR. Any of these Contribution Links can be used to link any of the elements to a Softgoal to model the way any of these Elements contributes to the satisfaction or fulfillment of the Softgoal (Elements, which are discussed in Section 5.2 'Elements/Nodes' are: Goal, Softgoal, Task, Resource, and Belief).

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Make
Some+
Help
Unknown
Break
Some-
Hurt
Or
And
Guideline (Beginner,Concept) Use Contribution Links from any element only to a Softgoal element.
Guideline (Beginner,Concept) Avoid introducing ad hoc or improvised link types. If you must, define their syntax and semantics as extensions to i*.
Guideline (Beginner,Concept) Use the OR Contribution Links to indicate alternatives for satisficing a Softgoal.
Guideline (Beginner,Concept) Don’t use Correlation or Contribution Links between actors.
Guideline (Beginner,Concept) Don’t use Correlation or Contribution Links from a Task to a Task.

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Contribution Links

5.5 Contribution Links

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