Enterprise systems should be assembled out of components and services according to an orchestration schema and taking into account not only functional requirements but also the resulting Quality of Service (QoS). In other words, QoS-aware composition of services and components must be performed. The problem is to find which components or services have to be employed that the resulting system wo...

The effort required to evaluate enterprise distribute real-time and embedded (DRE) system qualityof-service (QoS) attributes (such as response-time, latency, and scalability) depends heavily on system complexity and size. As these systems increase in complexity and size, therefore, DRE system developers and testers need improved methods and tools that facilitate QoS evaluation. This article des...

The collection and combination of assessment data in trustworthiness evaluation of cloud service is challenging, notably because QoS value may be missing in offline evaluation situation due to the time-consuming and costly cloud service invocation. Considering the fact that many trustworthiness evaluation problems require not only objective measurement but also subjective perception, this paper...

Quality of service (QoS) is increasingly being used to describe a broad collection of attributes, ranging from the performance-centric metrics used in the networking community to other metrics related to reliability, timeliness, and security. Moreover, QoS is also being applied to guarantees provided by a wider variety of services, ranging from communication services to higher level middleware ...

Software is gradually becoming more built by composing web services to support enterprise applications integration; thus, making the process of composing web services a significant topic. The Quality of Service (QoS) in web service composition plays a crucial role. As such, it is important to guarantee, monitor, and enforce QoS and ability to handle failures during execution. Therefore, an urge...

Multiconstraint QoS (quality of service) routing is an essential mechanism to support computer/communication applications that have requirements on various QoS attributes. The multiconstraint QoS routing problem involves finding a feasible path, i.e., a path satisfying a given set of QoS constraints between given source and destination nodes. Unfortunately, the multiconstraint QoS routing probl...

Grid computing provides a robust paradigm to aggregate disparate resources in a secure and controlled environment. Grid architectures require an underpinning Quality of Service (QoS) support in order to manage complex data and computation intensive applications. However, QoS guarantees in the Grid context have not been given the attention they merit. In order to enhance the functionality offere...

Grid computing provides a robust paradigm to aggregate disparate resources in a secure and controlled environment. Grid architectures require an underpinning Quality of Service (QoS) support in order to manage complex computationand data-intensive applications. However, QoS guarantees in the Grid context have not been given the importance they merit. In order to enhance the functionality offere...

Often many available web services provide similar functionality, but have different Quality of Service (QoS). In this case, a choice needs to be made to determine which services are selected to participate in a given service composition. This paper proposes a technique for QoS-aware service composition with the purpose to pro-actively minimize the rate of violations of a service level agreement...