Service Component Architecture (SCA) is a new promising programming model for constructing service-oriented application, which facilitates the development of business integration in SOA. However, SCA in its current form does not represent any formal definition. In addition, there is a growing interest for verification techniques which help to prevent SCA composition specification failure. In this paper, firstly, we present an Event-B model for formal representation and verification of an SCA based composition. And then, we extend this model in order to automate the transformation and the verification of the SCA assembly by the implantation of an Eclipse plug-in.