x SECTION 2: SERVICE PROVISION AND DESIGN Chapter 2: Semi-Automated Lifecycles for Eliciting Requirements for Service-Oriented Environments From a process and workflow point of view, Blake addresses the evolution of traditional software en- gineering approaches to support the conceptualization of abstract services that overlap multiple orga- nizations. He stresses that traditional software engineering lifecycles must be enhanced with emerging processes related to the development applications for service-oriented environments. This chapter also discusses state-of-the-art approaches that elicit information about the requirements for service-oriented architectures. These approaches tend to leverage existing requirements engineering approaches to sug- gest aggregate service-based capabilities that are most effective for a particular environment. Chapter 3: Quality of Service and Extra-Functional Properties for Web Services: A Model-Driven Approach Stressing the importance of requirements specifications, Ortiz presents a model-based approach to deal with specifications and implementations of Quality of Service (QoS) and extra-functional properties (EPF) in a loosely coupled manner. The presented approach draws on two main software techniques, Model-Driven Architecture (MDA), which transforms models of QoS and EPF into code, and Aspect-