Service level agreements (SLAs), or contracts, have an important role in web services. They
define the obligations and rights between the provider of a web service and its client, about …

This document presents some results obtained in the field of network calculus, a theory
based on the (min, plus) algebra and whose aim is to compute worst-case performance …

In this paper we extend our previous work on soft probabilistic contracts for QoS
management, from the particular case of" response time", to general QoS parameters. Our …

We study QoS-aware management of service orchestrations, specifically for orchestrations
having a data-dependent workflow. Our study supports multi-dimensional QoS. To capture …

Service Level Agreements (SLAs) have been proposed in the context of web services to
maintain acceptable quality of service (QoS) performance. This is specially crucial for …

In this paper, the authors develop a comprehensive framework for QoS management based
on soft probabilistic contracts. The authors approach also encompasses general QoS …

Web services are software applications that are published over the Web, and can be
searched and invoked by other programs. New Web services can be formed by composing …

In concurrent real-time processes, the speed of individual components has a double impact:
on the one hand, the overall latency of a compound process is affected by the latency of its …

While extensive foundational work exist for the functional aspects of Web service
orchestrations, very little exists regarding the foundations of Service Level Agreements …

By allowing service calls to be guarded by contexts, Asymmetric Event Structures (AES for
short) and contextual nets are a convenient framework to model composite Web services or …