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concepts. Both methods have been explored by different research groups. Industry dissemination is at the beginning, but KAOS with the support of Objectiver has been more effective in terms of technology transfer. Table 1. Five criteria comparison with drawbacks and potentialities. 4. Conclusion

Table 1 concepts. Both methods have been explored by different research groups. Industry dissemination is at the beginning, but KAOS with the support of Objectiver has been more effective in terms of technology transfer. Table 1. Five criteria comparison with drawbacks and potentialities. 4. Conclusion

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Figure 2 is an example of i* SD model for the EC - Expert Committee example. The model illustrates the strategic dependency relationships among actors. In this paper, we only focus on the relationship between chair and author. The SD model shows that the chair depends on the author to achieve the goal “Article BeSent”, to satisfy the softgoal “Quality [article]” and to provide the resource “Camera Ready” furthermore, the author depends on the chair to get the resources “Quality Directions” and “Review result”. In an SR model an actor can have one or more goals. Recursive representations can occur too: (1) a softgoal may be a means and may be an end for another relationship; (2) a goal in a task-decomposition may be an end in a means-ends relationship. Figure 1 shows
Figure 2 is an example of i* SD model for the EC - Expert Committee example. The model illustrates the strategic dependency relationships among actors. In this paper, we only focus on the relationship between chair and author. The SD model shows that the chair depends on the author to achieve the goal “Article BeSent”, to satisfy the softgoal “Quality [article]” and to provide the resource “Camera Ready” furthermore, the author depends on the chair to get the resources “Quality Directions” and “Review result”. In an SR model an actor can have one or more goals. Recursive representations can occur too: (1) a softgoal may be a means and may be an end for another relationship; (2) a goal in a task-decomposition may be an end in a means-ends relationship. Figure 1 shows
Figure 2. SD Model (EC - Expert Committee) adapted from [18]
Figure 2. SD Model (EC - Expert Committee) adapted from [18]
Figure 3 portrays the SR model involving the actors author and chair. See for example chair when the chair is dealing with authors, chair’s main goal is “Best Articles BePublished”, which has one only task to achieve the goal. The diagram shows the task “Manage submitted articles” has three goals (or sub goals) Figure 3. SR Model (EC - Expert Committee), this example, from [18], is part of the SR Model.
Figure 3 portrays the SR model involving the actors author and chair. See for example chair when the chair is dealing with authors, chair’s main goal is “Best Articles BePublished”, which has one only task to achieve the goal. The diagram shows the task “Manage submitted articles” has three goals (or sub goals) Figure 3. SR Model (EC - Expert Committee), this example, from [18], is part of the SR Model.
The model shows that an_ essential task “ReceiveArticle BySystem” depends on “Article BeSent” from author; needs “Prepare Quality Directions” to authors, in order to give the quality specifications and directions; creates a resource “Authors of Articles” to other tasks and provides chair with some softgoals: “Effortless [submission]”, “Security [submission]”, and “Secrecy [review]”. One can see in Figure 3 that both the softgoal “Security” and the softgoal “Secrecy” contribute “negatively” (hurt) to the softgoal “Effortless” because probably chair will have to enter with a password for this process. By showing these softgoals in the SR model KAOS has been developed and refined for over 15 years of research with the development of tools and with experience in several industrial projects [1]. KAOS, according to Lamsweerde [1], [10] means Keep All Objects Satisfied. This method is considered a multi-paradigm model that allows a combination of different levels of expression and rationale: semiformal for modeling and structuring goals, qualitative for alternative selections and formal for the critical elements. In general, KAOS modeling has an external graphic semantic layer with concepts, attributes and relationship and an internal formal layer assisted by temporal logics. In Figure 4 we show a KAOS meta- model built based on the meta-model proposed by Heaven and Finkelstein (2004) [17].
The model shows that an_ essential task “ReceiveArticle BySystem” depends on “Article BeSent” from author; needs “Prepare Quality Directions” to authors, in order to give the quality specifications and directions; creates a resource “Authors of Articles” to other tasks and provides chair with some softgoals: “Effortless [submission]”, “Security [submission]”, and “Secrecy [review]”. One can see in Figure 3 that both the softgoal “Security” and the softgoal “Secrecy” contribute “negatively” (hurt) to the softgoal “Effortless” because probably chair will have to enter with a password for this process. By showing these softgoals in the SR model KAOS has been developed and refined for over 15 years of research with the development of tools and with experience in several industrial projects [1]. KAOS, according to Lamsweerde [1], [10] means Keep All Objects Satisfied. This method is considered a multi-paradigm model that allows a combination of different levels of expression and rationale: semiformal for modeling and structuring goals, qualitative for alternative selections and formal for the critical elements. In general, KAOS modeling has an external graphic semantic layer with concepts, attributes and relationship and an internal formal layer assisted by temporal logics. In Figure 4 we show a KAOS meta- model built based on the meta-model proposed by Heaven and Finkelstein (2004) [17].
Figure 5. KAOS Models. Examples from Objectiver [13] show the four perspectives of KAOS Models.
Figure 5. KAOS Models. Examples from Objectiver [13] show the four perspectives of KAOS Models.
Figure 6. The EC example modeled in KAOS
Figure 6. The EC example modeled in KAOS
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Computer ScienceGoal Oriented Requirements EngineeringRisk AnalysisRequirement EngineeringNon Functional RequirementRepresentation Politics
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