Customer-defined service level agreements for composite applications

Unger, Tobias; Mietzner, Ralph; Leymann, Frank

doi:10.1080/17517570903033431

Cited by 24 publications

(8 citation statements)

References 18 publications

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“…Rosenberg et al [23] utilized a top-down modeling approach to identify the service-level agreements (SLAs) required for each joining user in web services designed to support business process development and execution. Ungera et al [24] presented a model for describing customer-defined SLAs for composite applications and ensuring the subsequent satisfaction of the requested QoS.…”

Section: Web Service Discovery and Selectionmentioning

confidence: 99%

An evidence-based scheme for web service selection

Wang

Chao

et al. 2011

Inf Technol Manag

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Existing studies on the web service selection problem focus mainly on the functional QoS properties of the service rather than the consumer satisfaction and trust aspects. While a good QoS enhances the reputation of a service, different consumers invariably hold differing views of the service contents. Some service reputation approaches primarily consider the consumer's prior experience of the service via opinion feedback system, may neglect the effect of social trust transition in the recommendations of others. As a result, the problem of reaching consensus on the level of consumer trust regarding service becomes one of key issues in service selection. This study proposes a trust-based service selection model to estimate the degree of consumer trust in a particular service based on the consumers' direct experience and indirect recommendation of the service. In the proposed approach, the degree of consumer trust is correctly estimated by extending Dempster-Shafer evidence reasoning theory to the reputation computation using consumers' direct experience and incorporating Jøsang's belief model for solving the trust transition problem in the indirect recommendation of the service. The proposed model effectively enables deception detection by means of existing bodies of evidence, and therefore excludes the fraudulent evidence of malicious evaluators from the selection process. In addition, a quality index is proposed to help third party (TTP) examine the body of evidence and make the outranking result more reliable. Importantly, the quality index is based not only on the confidence degree of the evidence, but also on the support degree, and therefore discovers the effects of intentional negative assessments.The validity of the proposed approach is demonstrated numerically by means of two service selection examples.

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Section: Web Service Discovery and Selectionmentioning

confidence: 99%

An evidence-based scheme for web service selection

Wang

Chao

et al. 2011

Inf Technol Manag

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“…There are different approaches describing a (composite) application: An application model which includes dependency and deployment relations between components is formalized in [22]. Mietzner [23] describes cafe which supports modeling and deployment of composite applications, formalized by a formal definition of an application model.…”

Section: A Models For Enterprise Topologymentioning

confidence: 99%

Formalizing the Cloud through Enterprise Topology Graphs

Binz

Fehling

Leymann

et al. 2012

2012 IEEE Fifth International Conference on Cloud Computing

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Enterprises often have no integrated and comprehensive view of their enterprise topology describing their entire IT infrastructure, software, on-premise and offpremise services, processes, and their interrelations. Especially due to acquisitions, mergers, reorganizations, and outsourcing there is no clear 'big picture' of the enterprise topology. Through this lack, management of applications becomes harder and duplication of components and information systems increases. Furthermore, the lack of insight makes changes in the enterprise topology like consolidation, migration, or outsourcing more complex and error prone which leads to high operational cost. In this paper we propose Enterprise Topology Graphs (ETG) as formal model to describe an enterprise topology. Based on established graph theory ETG bring formalization and provability to the cloud. They enable the application of proven graph algorithms to solve enterprise topology research problems in general and cloud research problems in particular. For example, we present a search algorithm which locates segments in large and possibly distributed enterprise topologies using structural queries. To illustrate the power of the ETG approach we show how it can be applied for IT consolidation to reduce operational costs, increase flexibility by simplifying changes in the enterprise topology, and improve the environmental impact of the enterprise IT.

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“…SOA holds the promise to bring business and IT together, by repeated aggregation of IT services into composite applications supporting business services that in turn are aggregated into business processes [14]. Figure 1 shows the basic architectural pattern that underlies SOA.…”

Section: Soa Foundationmentioning

confidence: 99%

From Service-Oriented Architecture to Service-Oriented Enterprise

Sinderen

2009

Proceedings of the 3rd International Workshop on Enterprise Systems and Technology

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Service-Oriented Architecture (SOA) was originally motivated by enterprise demands for better business-technology alignment and higher flexibility and reuse. SOA evolved from an initial set of ideas and principles to Web services (WS) standards now widely accepted by industry. The next phase of SOA development is concerned with a scalable, reliable and secure infrastructure based on these standards, and guidelines, methods and techniques for developing and maintaining service delivery in dynamic enterprise settings. In this talk we discuss the principles and main elements of SOA. We then present an overview of WS standards. And finally we come back to the original motivation for SOA, and how these can be realized.

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Customer-defined service level agreements for composite applications

Cited by 24 publications

References 18 publications

An evidence-based scheme for web service selection

An evidence-based scheme for web service selection

Formalizing the Cloud through Enterprise Topology Graphs

From Service-Oriented Architecture to Service-Oriented Enterprise

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