Services for service-oriented architectures can be modelled in different ways, including well-known existing OMG standard SoaML and an IBM methodology SOMA. Involving domain expert stakeholders in the system specification and development process plays an important role and is often inevitably combined with model transformations between different levels of abstraction. Recommendations for those supporting users during the modelling process along the chosen methodology can aid the development performance and thus reduce model transformation efforts. This paper shows how bidirectional model transformations between OMG MDA’s CIM and PIM levels can be enhanced through recommendations and which obstacles on the way to a comprehensive framework for model-driven development are still to overcome.