The shift from product-oriented to service-oriented business requires a rethink, especially in traditional companies in the mechanical and plant engineering industry. This guideline for the development of Smart Services business models is intended to illustrate the complexity and thus improve their handling, supporting the planning and modelling of a Smart Service. The focus of this paper is to introduce a step-by-step model to develop business models for small and medium sized enterprises in the manufacturing industry and on the selection of suitable service business model patterns. Therefor it will show alternative service business model patterns and at the end to select the right one. This is an important process before starting smart service engineering.