Building Information Modeling will shape the future of the building industry. The way of designing, constructing and operating real estates will be changed by this new technology. Hence, a digital building model is used as a central information database and is developed throughout the entire creation cycle of a building. The imminent change of the planning culture is illustrated by the graduated plan Digitales Planen und Bauen published by the Federal Ministry of Transport and Digital Infrastructure in December 2015. For an economic implementation of Building Information Modeling (BIM) in German companies, new ways of thinking and a structured way of working are of great importance. With BIM, all participating planners need to work across all disciplines of one building model. Thus, these changes call for the definition of more standards in the field of building and construction. The determination of geometric and non-geometric information contained in the digital model is one key aspect within this context. Specifications for the so-called Level of Development (LoD) for the various project phases have already been developed on an international level. This thesis focusses on the development of an appropriate LoD concept for digital building models, which have to be defined to implement BIM in a medium-sized company. This concept will then be used for a model-based tender calculation of a structural engineering project. Furthermore, the processes of project execution before and after the implementation of the BIM methodology in the medium-sized company are compared. Regarding this purpose, the theoretical basis is created in the first part of this thesis. In addition to the definition of the term BIM, the national and international development of BIM are stated. To create a common understanding, the terms Level of Development, Level of Geometry and Level of Information are analysed, and their differences are pointed out. At the very end of the basic theoretical chapter new project roles in the BIM process are presented. The second part describes the development of a BIM-based process chain. After presenting the business structure of the medium-sized company, the project execution model “HP3” is explained, with which the company realizes turnkey projects. In doing so, the requirements of participants in the HP3 project process will be addressed. After a detailed description of the HP3 process chain, the development of the BIM-based chain follows. Therefore, the Levels of Development are assigned to the planning phases first. Processes added due to the implementation of BIM and the illumination of the information flow within the BIM Process are then explained using the BIM process chain. The third part contains the development of the LoD concept as a support for a mode-based tender calculation. In addition to that, this LoD concept is intended to create a communication basis for all project participants and ensures the quality of the model. For this purpose, the information density in the individual phases of the project planning is defined for selected structural components. Part four describes the process of BIM-based tendering. A computer program named “BIM4You” was introduced in the medium-sized company to work as an interface between the digital model and the bill of quantities. Thereafter the function of the interface linkage is illustrated. Furthermore, model-based tendering for diverse Levels of Development are presented. In addition, the feasibility of a cost calculation at an early planning state and a variant study are examined. A summary and the identification of further development opportunities for BIM in the company conclude the thesis.     «

Building Information Modeling will shape the future of the building industry. The way of designing, constructing and operating real estates will be changed by this new technology. Hence, a digital building model is used as a central information database and is developed throughout the entire creation cycle of a building. The imminent change of the planning culture is illustrated by the graduated plan Digitales Planen und Bauen published by the Federal Ministry of Transport and Digital Infrastruc...     »