Current network infrastructures are experiencing rapid transformation from providing mere connectivity, to a wider range of flexible network services with Quality of Service (QoS). We propose an agentenhanced system that facilitates dynamic Service Level Agreement (SLA) activities, such as end-to-end QoS specifications and service price negotiations in such an environment. A prototype system co...

In order to perform continuous monitoring, SLA document between interested parties has to be signed. These documents should be in machine readable format in order to automate monitoring process. On the other hand, it would be beneficial if it is human readable, too. This way, it is easier to perform configuration and maintenance of monitoring subsystem. Building up on our previous work, in this...

Virtual co-branding moves to the Web a popular practice in the physical world whereby a customer partner syndicates the services (e.g. product retail) of a provider partner in his own portal. However, virtual brand integration is more than offering each brand products in the same virtual space. Other aspects such as reliability, usability or quality of distinct supporting services should be agr...

Automated management and monitoring of service contracts like Service Level Agreements (SLAs) or higherlevel policies is vital for efficient and reliable distributed service-oriented architectures (SOA) with high quality of service (QoS) levels. IT service provider need to manage, execute and maintain thousands of SLAs for different customers and different types of services, which needs new lev...

On-line end-to-end Service Level Agreement (SLA) monitoring is of key importance nowadays. For this purpose, recent researches have focused on measuring (when possible), or estimating (most of the times) network Quality of Service (QoS) and performance parameters. Up to now, all the proposed solutions have the drawback of requiring a huge amount of resources with low accuracy, generally leading...

Traditional approaches to on-line end-to-end Service Level Agreement (SLA) assessment have focused on the estimation of network QoS parameters. These approaches, however, face a trade-off between accuracy and the amount of resources needed to achieve such accuracy. This paper offers an alternative approach, where instead of estimating QoS parameters, we propose an effective and lightweight solu...

Cross-company gathering of information about physical goods using RFID increases the transparency in complex supply chains. The EPCIS specification represents a standard for RFID-based event data and corresponding interfaces to capture and exchange it. These technical premises enable the development of new approaches towards evaluating Service Level Agreement compliance of service providers. In...

A common approach to the process of reaching agreements is the publication of templates that guide parties to create agreement o ers that are then sent for approval to the template publisher. In such scenario, a common issue the template publisher must address is to check whether the agreement o er received is compliant or not with the template. Furthermore, in the latter case, an automated exp...

Cloud computing recently became the key element of providing services via the internet. Cloud technology is new paradigm of computing where available computing resources are delivered as a service. These resources are generally offered under the concept of pay-as-you-use. Nowadays, some of e-commerce companies move to Cloud services. Cloud offers positive opportunities for ecommerce companies w...

Infrastructure as a Service (IaaS) Clouds offer capabilities for the high-availability of a wide range of systems, from individual virtual machines to large-scale high performance computing (HPC) systems. But it is argued that the widespread uptake for such systems will only happen if Cloud providers, or brokers, are able to offer bilateral service level agreements (SLAs). In this paper, we dis...