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For service-oriented systems the estimation of QoS is an important factor to determine whether a prospective service composition will meet the expectations of its final users. Many approaches to QoS estimation of service compositions have been proposed. However, not all of them allow the QoS of composition be estimated a priori and systematically from the QoS of its individual services. This is an...
In this paper, the work developed aims at contributing to the research related to the Quality of Service (QoS) for Web services. We started this research by providing a comprehensive review and description of the QoS specifications that comprise some already existing factors contributing to the QoS and some newly proposed ones. These include the availability, accessibility, reliability, integrity,...
Service recommendation in a Web of services with uncertain QoS is a challenging problem. In this paper, we propose a reputation-based service recommendation framework. We formally define a service reputation model that analyzes the relations between uncertain QoS and reputation. We also devise a two-phase planning approach to constructing a composite service as the recommendation when none of existing...
As the development of Web service, reliable service quality evaluation has become the key in the service optimization. This paper addresses this problem by proposing a reliable service quality evaluation model in the Web services community. The model initially imports Web service community aiming at evaluation unreliable when involved criterions are beyond service domain. The assistant domain Ontology...
Service availability and QoS, in terms of customer affecting performance metrics, is crucial for service systems. However, the increasing complexity in distributed service systems introduce hidden space for software faults, which undermine system availability, leading to fault or even down time. In this paper, we introduce a composition technique, Coordinated Selective Rejuvenation, to automate the...
Applications are increasingly composed of remote services provided by independent parties. This distributed ownership makes it problematic to measure and control quality of service indicators. Management activities must become an integral part of the system's development process, from requirements elicitation, where users identify the quality dimensions of interest, to the implementation, where the...
In the Service Web, customers' feedback constitutes a substantial component of Web Service reputation and trustworthiness, which in turn impacts the service uptake by consumers in the future. This paper presents an approach to predict reputation in service-oriented environments. For assessing a Web Service reputation, we define reputation key metrics to aggregate the feedback of different aspects...
Currently, the mobile market provides simple solutions for the definition of business models among the actors involved in the value chain. For instance, App Stores establish predefined business elements for service providers and customers, and it is difficult to identify differentiation characteristics from the business point of view. Dynamic Business Models are an evolution aimed to provide new enablers...
The application of market mechanisms for the resource allocation of cloud computing services is a demanding task, which requires bridging economic and associated software agent technical challenges. Dynamic changes in the availability of resources over time makes the treatment more complicated. Here we employ an allocation mechanism and pricing mechanism as a market-based model to allocate resources...
Applying choreography and orchestration technology has become a popular method of attacking Business-2-Business integration (B2Bi) challenges like agreement and communication among integration partners, compatibility of interacting processes and distributed computing. ebXML BPSS (ebBP) as dedicated B2Bi choreography standard and WS-BPEL as number one Web service orchestration language are particularly...
With the development of services computing technology, more and more voluntary services have been available on the Internet. When using voluntary services, users tend to obtain higher QoS (e.g., get more computational resources to improve throughput of the services) than they actually need because there is no cost. To control QoS of the voluntary services appropriately, it is necessary to design resource...
SOA and cloud computing have brought new opportunities for the long expected agility, reuse and the adaptive capability of IT to the ever changing business requirements and environments. But due to the immature nature of the rapidly evolving technologies, especially in the areas of security, service or information integrity, privacy, quality of service and their possible detrimental consequences,...
Service modeling is a critical step in describing customer requirements and designing service systems. The quality of service models determines the quality of service systems to a great extent. To analyze the service models in a way that would show deficiencies in delivering service values, we propose the idea of "value annotation" by which expected values are labeled on the functional elements...
Web service composition is a promising solution for building distributed applications on the e-business processes, and with web services providing similar functional characteristics, Quality of Service (QoS) is the main factor to differentiate them. It is imperative to provide service consumers with facilities for selecting the only web services for their requirement according to their non-functional...
Based on the dimensions of information providers and users, a model of QoS is established for SOA-oriented information resource management. This model could be used to analyze the information resource QoS, which is helpful for managing and planning information resources QoS.
Current work on service systems is flourishing. Both researchers and practitioners seek to build service systems to create innovative services and increase productivity in the service sector. Unfortunately, most of the existing work focuses on information systems and their lack of models that not only represent entities in service systems with formal methods, but also illustrate a mechanism to achieve...
Web service composition has been recognized as a flexible way for resource sharing and application integration. As the number of functional similar Web services increases, how to select Web services that can best meet the requirements of the consumers becomes an ongoing research direction in Web service community. Quality of Service (QoS) is the main factor to differentiate them. It is imperative...
This thesis puts forward an innovative model of health management service grid, and gives the overall architecture of health management grid platform system by which a health management service model can be established based on the analysis of present condition of health management in China. This paper also presents a new integrated model about the health management service resources by using the...
Companies, institutions, and local authorities look for virtualizing all provided services to obtain more profit in terms of productivity, profitability, quality of service, traceability. The main issues are the identification of problems to solve and the choice of adapted solutions. To build these ones, functional and technical profiles must communicate to understand precisely the domain, the problem,...
Consumers increasingly use online services in their everyday life: when they drive a car, at home and at work. We address the problem of selecting for the consumer, the most valuable online service, according to the consumer value preferences. We combine our work for value analysis of service networks with our work on selecting services based on quality of service requirements. We show with examples...
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