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The concept of development effort generally means the time or the cost of developing a software service. An essential factor to successfully manage and control a project is the accurate estimation of the development effort and an over and underestimation lead to the loss of project resources. So far, different effort estimation models have been presented in three domains: expert judgment, algor...

Software as a Service (SaaS) has become the new paradigm in software development. Ecosystems of Web Services can be flexibly and dynamically composed to suit user specific needs. Quality is essential to the success of service based applications. The process of service composition has a major impact on the quality of the final product. We propose a dynamic and flexible Quality of Service Composi...

The ongoing trend towards a global services economy creates considerable market opportunities and challenges for providers of Software-as-aService (SaaS). For meeting customer expectations, an on-demand business model and a service-oriented infrastructure capable of composing services into service networks are the primary approach. Ensuring quality of service and providing detailed guarantees v...