Article history: Received 26 April 2010 Accepted 18 January 2011 Available online 21 February 2011 IT-based Service Economy requires Service Markets to flourish for the trade of services. A market does not represent a simple buyer-seller relationship, rather it is the culmination point of a complex chain of stake-holders with a hierarchical integration of value along each point in the chain. To...

rapid growth of e-commerce has made the competition quite different. in this new environment customers have wide choices and are looking forward to the support which guarantees the delivery of what they have chosen. this leads to complexity in the relationship between the provider and the customer which obviously is made more in a b2b environment. service level agreement (sla) is a key tool to ...

In a market-oriented service computing environment, both back-end SLA (service level agreement) offers and front-end SLA requirements should be considered when performing service composition. In this paper, we address the optimization problem of SLA-constrained service composition and focus on the following issues: the difficulties related to preference definition and to weight assignment, the ...

Resource scheduling based on SLA(Service Level Agreement) in cloud computing is NP-hard problem. There is no efficient method to solve it. This paper proposes an optimal model for the problem and give an algorithm by applying stochastic integer programming technique. Applying Gröbner bases theory for solving the stochastic integer programming problem and the experimental results of the implemen...

Service-level agreements (SLA) are essential for IT service management due to the complexity of IT service delivery model and the importance of ensured Quality of Service (QoS) for corporate clients. This study proposes a novel geometric framework for analyzing the optimal pricing and capacity planning for IT service provider under SLA. The IT service with congestion costs is modeled using an M...

Next generation network (NGN) should facilitate a single party to establish quality of service (QoS) enabled path between the two IP providers mutually interconnected by one or more transit providers. For that purpose, an end-to-end service level agreement (SLA) should be negotiated and maintained. In this article, we propose interconnection charging, which is controlled by the end-toend SLA. R...

The Service Level Agreement (SLA) based grid superscheduling approach promotes coordinated resource sharing. Superscheduling is facilitated between administratively and topologically distributed grid sites by grid schedulers such as Resource brokers. In this work, we present a market-based SLA coordination mechanism. We based our SLA model on a well known contract net protocol. The key advantag...

In the scope of the applications developed under the service-based paradigm, Service Level Agreements (SLAs) are a standard mechanism used to flexibly specify the Quality of Service (QoS) that must be delivered. These agreements contain the conditions negotiated between the service provider and consumers as well as the potential penalties derived from the violation of such conditions. In this c...

Oversubscription can leverage under utilized capacity in the cloud but can lead to overload. A cloud provider must manage overload due to oversubscription for maximizing its profit while minimizing any service level agreement (SLA) violations. This paper develops an understanding of oversubscription in cloud through modeling and simulations, and explores the relationship between overload mitiga...

We present our experience of a three-week fieldwork in the form of a contextual inquiry with a service manager at the EPFL IT department. During these three weeks, we encounter a refusal of a user committee to sign a servicelevel agreement (SLA). We describe the context in which this refusal occurs, and we uncover our findings about the core of ITIL’s service-level management that building rela...