To exploit the true potential of Web services, it is critical to develop technologies and tools for composing new services from existing ones. Indeed, to reduce development time and integration efforts, this process of service composition requires an effective development environment to facilitate quick and simple composition of Web services, and remains a key challenge to realize the true potential of Web services . While numerous composition approaches have been developed, very little has been done towards providing an Integrated Development Environment to ease the process of composition. In this context, this paper introduces a new incremental approach to service composition engineering and considers the composition global life-cycle, i.e. specifying, composing, verifying, deploying, monitoring, and analyzing to achieve a full governance of the composition.