Supporting decision-making for self-adaptive systems: from goal models to dynamic decision networks

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Abstract

Context/Motivation - Different modeling techniques have been used to model requirements and decision-making of self-adaptive systems (SASs). Specifically, goal models have been prolific in supporting decision-making depending on partial and total fulfilment of functional (goals) and non-functional requirements (softgoals). Different goalrealization strategies can have different effects on softgoals which are specified with weighted contribution-links. The final decision about what strategy to use is based, among other reasons, on a utility function that takes into account the weighted sum of the different effects on softgoals.
Questions/Problems - One of the main challenges about decisionmaking in self-adaptive systems is to deal with uncertainty during runtime. New techniques are needed to systematically revise the current model when empirical evidence becomes available from the deployment.
Principal ideas/results - In this paper we enrich the decision-making supported by goal models by using Dynamic Decision Networks (DDNs). Goal realization strategies and their impact on softgoals have a correspondence with decision alternatives and conditional probabilities and expected utilities in the DDNs respectively. Our novel approach allows the specification of preferences over the softgoals and supports reasoning about partial satisfaction of softgoals using probabilities. We report results of the application of the approach on two different cases. Our early results suggest the decision-making process of SASs can be improved by using DDNs.

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Publication date2013
Publication titleRequirements engineering : foundation for software quality : 19th InternationalWorking Conference, REFSQ 2013 Essen, Germany, April 8-11, 2013 : proceedings
EditorsJörg Dörr, Andreas L. Opdahl
Place of PublicationBerlin (DE)
PublisherSpringer
Pages221-236
Number of pages16
ISBN (Electronic)978-3-642-37422-7
ISBN (Print)978-3-642-37421-0
Original languageEnglish
Event19th international working conference on requirements engineering: foundation for software quality - Essen, Germany

Publication series

NameLecture notes in computer science
PublisherSpringer
Number7830
ISSN (Print)0302-9743
ISSN (Electronic)1611-3349

Conference

Conference19th international working conference on requirements engineering: foundation for software quality
Abbreviated titleREFSQ 2013
CountryGermany
CityEssen
Period8/04/138/04/13

DOI

Employable Graduates; Exploitable Research

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