Modern companies, including telecommunication ones and mobile operators, working in the global environment, need to guarantee technological effectiveness and innovation, renewing their technologies and services. Communication technologies and variety of services are to be improved and developed extremely fast. This results in the need for constant adaptation and reconfiguration of complex software systems, used in global environment to provide and monitor deployed services. For instance, OSS/BSS is used in the domain of telecommunication companies. Reconfiguration of complex software systems covers application development for service provisioning, their dynamic monitoring and reconfiguration. Currently, system adaptation and service design strategies are poorly formalized and validated. In current state-of-the-art approaches, several iterations involving analysts and system architects are necessary, resulting in time and money consuming service development. The approach proposed in this paper fills this gap. It employs a well-defined workflow and analysis model for developing and adapting complex software systems. The applicability of this novel approach is confirmed by an implemented software tool. The proposed approach and tool provide automation of service development, focusing on planning and design stages, considering both functional and non-functional requirements and realizing computational independent workflow transformation into its execution model.