The development, registration, discovery, and invocation of quality Web services are vital for the successful implementation of applications using Web services. Considerable research focuses on quality for Web services. Unfortunately, current research on Quality of Service (QoS) for Web services is concentrated on service users and the implementation stage. This research highlights the importan...

QoS (Quality-of-Service) is an important topic in cloud computing. It is very difficult to make a decision on choosing the cloud services depending on QoS requirements. These requirements have to be satisfied by both cloud service providers and cloud users. So, Optimal Service Selection is needed to obtain high quality cloud applications. With the increasing number of Cloud services, Quality-of...

Cloud computing systems promise to offer subscription-based, enterprise-quality computing services to users worldwide. As the demand for delivering services to a large number of users has increased, they need to offer differentiated services to users and meet their expected quality requirements. Service-Oriented Computing (SOC) enables the alignment of loosely coupled services with different le...

In a Service-Oriented System (SOS), service requesters specify tasks that need to be executed and the quality levels to meet, whereas service providers advertise their services’ capabilities and the quality levels they can reach. Service selectors then match to the relevant tasks, the candidate services that can perform these tasks to the most desirable quality levels. One of the key problems i...

This contribution deals with service quality evaluation methods. With increased demand for real-time multimedia services, several types of traffic flows traverse the network infrastructure. Broad spectrum of heterogeneous services requires that different network conditions must be met using a toolset called Quality of Service (QoS). Accurate evaluation of delivered QoS is necessary. This contri...

As the number of available Web services increases, there is a growing demand to find the service that best fits the user’s requirements. Especially, when a set of services fulfilling user’s functional requirements have been discovered, among these services which one will be invoked by the user depends mostly on the Quality of Services (QoS). The problem, however, is that the service providers m...

Building high quality cloud applications becomes an urgently required research problem. Nonfunctional performance of cloud services is usually described by quality-of-service (QoS). In cloud applications, cloud services are invoked remotely by internet connections. The QoS Ranking of cloud services for a user cannot be transferred directly to another user, since the locations of the cloud appli...