In Theory, Lean Production is commonly used across diverse industries and modern producing companies. This paper tests the theory byconducting a survey on the spread of Lean Production in the German speaking region (Germany, Switzerland and Austria). A system to measurethe implementation level of Lean Production was established and used to examine 85 participating companies in the assembly, process andmachining industry. With this survey the goal was to corroborate three underlying assumptions which are based on a comprehensive literatureresearch. Additionally, barriers and critical success factors of Lean Production and the overall satisfaction with the implementation of LeanProduction will be depicted