Lean Production-Systems (LPS) are widespread especially among the big automobile producers. LPS are company-specific configured systems which optimally coordinate technical, personal, and organisational methods. The implementation and maintenance (of elements) of an LPS requires a certain effort, but provides also many benefits. The effort-benefit relation especially for small and medium-sized enterprises is often not known. This paper allows in this context an overview of how to make this relation transparent as to production factors and size of enterprise.