4.3.2 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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Please provide the following information for each variation:
1. Name of Modeling Framework/School/Location/Research Group
2. Variation and explanation
3. Example(s)

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Variation: Different Types of Contributions

Some uses of i* notation do not use all of the different types of contribution links presented in this guide. For example, in the provided reference, only positive and negative contribution links are used, marked with a "+" and a "-" respectively. There is no further distinction between the relative strength of these contributions. See Figure 1 for an example.

Figure 1: Example i* Model showing +/- Contribution links (from Reference Below)

Reference: X. Franch, “On the Quantitative Analysis of Agent-Oriented Models”, 18th International Conference on Advanced Information Systems Engineering (CAiSE’06), pp. 495-509. LNCS, vol. 4001. 2006.

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