In the past few years and decades there have been major efforts to optimize production by methods such as Lean Manufacturing. After
introducing these methods with success in the production area, the Lean philosophy spilled over toother areas such as administration,
healthcare or even the construction industry. Especially with Lean Construction helpful methods were developed to reduce waste in the
organization of the installation work on-site. Many industrial companies, particularly from the Engineer-to-order (ETO) sector,have great
difficulties to interlock with each other the areas of engineering, manufacturing and installation on-site. Thus, this paper describes a holistic
Lean Enterprise approach to avoid waste in the whole process by synchronizing all activities throughout engineering, productionand the
execution phase on-site.