The aim of this thesis is to overcome the barriers of the application of Lean Construction in the construction industry by integrating Building Information Modeling (BIM) in the processes. Through digital support, Lean Construction has the potential to be applied more effectively and to support the development of the different processes more efficiently. The relevant Lean Construction principles and tools, which can boost efficiency in the construction process, were chosen based on a literature research. These principles and tools are mentioned in literature which combines a Lean Construction and BIM-relevant view.

Through the digitalization of models and information, BIM benefits the different phases of construction projects. This could not only be seen by the visualization of three dimensional models. It also supports coherence in the information and communication processes. The Building Information Modeling principles are derived from its opportunities and capabilities. The tools are shown by the different software solutions which are provided for the industry. The potential, which results from the combination of Lean Construction and BIM methods, was then analyzed. The analysis shows a high potential to arrange the Lean Construction process efficiently by supporting the application with digital methods.

Based on this analysis the author developed a concept, which increases flow and efficiency in the construction process. By integrating subcontractors to work with this concept, they get in touch with the BIM method in an easy way. The construction time was set by all participants with a pull flow planning and using the advantages of measured time planning. Constructed elements will get marked based on the colors of a traffic light system according to their stage of completion. These markings display the actual stage of construction to every participant and improve the work flow. A construction element can only be marked green if its quality and grade is in the right condition at the planned time. After the construction manager has verified the built elements he can decide if the model element gets a green marking or if there has to be any rework. If it is not possible, because of missing preliminary work or plan amendments, the modeled element gets marked with red color.

The produced digital information, which is attached to the time and construction elements, can provide advantages for parallel and next work stations. A generated chart of the quantity of the different marked construction elements helps to calculate and adapt the workers to finish the construction work in time.

These controlling based quantities can also be used for creation of partial invoices and service specification. To get some feedback of the concept it was discussed with experienced partners of the construction and BIM industry. These discussions showed that the concept can be easily introduced for every participant and enhances with its traffic lights the efficiency in the processes and supports adherence to the demanded quality. A further strength of this concept was outlined by the interviewed experts in the use of these information for subsequent stages in the construction process.