Adaptation in Open Systems: Giving Interaction Its Rightful Place

Dalpiaz, Fabiano; Chopra, Amit K.; Giorgini, Paolo; Mylopoulos, John

doi:10.1007/978-3-642-16373-9_3

Cited by 20 publications

(21 citation statements)

References 15 publications

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“…We go further by providing the formal foundations for RE for sociotechnical systems. Dalpiaz et al [15] illustrate how principals providing services can use commitments to and from others in reasoning about the satisfaction of their own goals. However, such work does not explain how the commitments are obtained starting from the stakeholders needs.…”

Section: Relevant Literaturementioning

confidence: 99%

Protos: Foundations for engineering innovative sociotechnical systems

Chopra

Dalpiaz

Aydemir

et al. 2014

2014 IEEE 22nd International Requirements Engineering Conference (RE)

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Abstract-We address the challenge of requirements engineering for sociotechnical systems, wherein humans and organizations supported by technical artifacts such as software interact with one another. Traditional requirements models emphasize the goals of the stakeholders above their interactions. However, the participants in a sociotechnical system may not adopt the goals of the stakeholders involved in its specification. We motivate, Protos, a requirements engineering approach that gives prominence to the interactions of autonomous parties and specifies a sociotechnical system in terms of its participants' social relationships, specifically, commitments. The participants can adopt any goal they like, a key basis for innovative behavior, as long as they interact according to the commitments. Protos describes an abstract requirements engineering process as a series of refinements that seek to satisfy stakeholder requirements by incrementally expanding a specification set and an assumption set, and reducing requirements until all requirements are accommodated. We demonstrate this process via the London Ambulance System described in the literature.

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Section: Relevant Literaturementioning

confidence: 99%

Protos: Foundations for engineering innovative sociotechnical systems

Chopra

Dalpiaz

Aydemir

et al. 2014

2014 IEEE 22nd International Requirements Engineering Conference (RE)

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“…In other words, the authorisation is restricted to a certain purpose, and does not apply to different purposes. Our notion of goal scope adopts the definition in [1], which includes the goal tree rooted by that goal. As a result, if a goal is specified in the scope of authority, authority is given to make use of the information not only for the specified goal, but also for all its sub-goals.…”

Section: Multi-view Modellingmentioning

confidence: 99%

The Socio-technical Security Requirements Modelling Language for Secure Composite Services

Paja

Dalpiaz

Giorgini

2014

Secure and Trustworthy Service Composition

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Abstract. Composite services foster reuse and efficiency in providing consumers with different functionalities (services). However, security aspects are a major concern, considering that both service consumers and providers are autonomous and heterogeneous-thus, loosely controllable entities. When consumers provide information in order to be furnished some service, what happens to that information? Do service consumers trust service providers? In order to tackle the design of secure and trustworthy composite services, we should consider the security requirements such a composition must satisfy. We propose STS-ml, a security requirements modelling language that allows modelling security requirements over participants' (consumers and providers) interactions. These security requirements are expressed in terms of social contracts the various parties shall comply with while interacting (consuming/furnishing some service). Most importantly, STSml considers social and organisational threats that might affect the said composite services. In this chapter, we give an overview of STS-ml, introducing its modelling and reasoning capabilities while building models from the Aniketos eGovernment case study and verifying that the composite service complies with the specification, as well as checking whether a recomposition is needed.

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“…However, self-adaptation of STSs is complicated by their distributed, multi-agent nature where each agent can be a locus of adaptation, and adaptation typically involves interactions with other agents [3]. For example, an agent can delegate all/part of its commitments to an alternative agent.…”

Section: Introductionmentioning

confidence: 99%

“…There, a commitment C is a tuple (Debtor, Creditor, Antecedent, Consequent) where the Debtor agent is committed to fulfill the Consequent condition for the Creditor agent if the Antecedent condition holds. The requirements for an STS are modelled as goals, and a specification for fulfilling these requirements (also known as protocol) is modelled as a collection of commitments [3]. The adaptation decision of an agent for a particular goal consists of selecting an alternative protocol for fulfilling that goal.…”

Section: Introductionmentioning

confidence: 99%

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Evolving Commitments for Self-Adaptive Socio-technical Systems

Peng

Xie

et al. 2014

2014 19th International Conference on Engineering of Complex Computer Systems

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Socio-technical systems (STSs) consist of human, hardware and software agents that work in tandem to fulfill stakeholder requirements. A specification for an STS consists of a set of (social) commitments among participating agents that serve as a contract among them. However, by their very nature, STSs are open, dynamic and continuously evolving along with their environments. To ensure that such systems continue to satisfy their requirements, the agents that comprise an STS must continuously adapt their behaviors to take into account risks and opportunities that arise at runtime. This paper presents a decision-theoretic self-adaptation framework that proposes candidate adaptation strategies for participating agents. These strategies are implementable by reconfiguration of plans or even changes in contractual commitments among agents. The adaptation procedure involves negotiating commitment changes and possible compensations to/from creditor agents. To evaluate the proposal, the paper also presents the results of an experimental study with a simulated STS, which confirms that success rates for achieving stakeholder goals and overall tradeoff utility can be improved significantly by incorporating evolving commitments to support STS adaptation.

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Adaptation in Open Systems: Giving Interaction Its Rightful Place

Cited by 20 publications

References 15 publications

Protos: Foundations for engineering innovative sociotechnical systems

Protos: Foundations for engineering innovative sociotechnical systems

The Socio-technical Security Requirements Modelling Language for Secure Composite Services

Evolving Commitments for Self-Adaptive Socio-technical Systems

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