Planning mistakes represent a major reason for project risks in construction projects and the responsibilities concerning the major costs are located in early design phases. Thus, the improvement of planning-/ design quality is relevant for the achievement of project goals regarding costs, quality and time. The iterative nature, insufficient knowledge and further restrictions of the planning process lead to uncertainties and fuzziness respective to the development and selection of adequate alternatives and variants. The usage of the three-dimensional digital building with additional semantic information in terms of Building Information modeling (BIM) is a promising approach to increase the efficiency of building projects and its planning processes. A significant benefit, compared to the two-dimensional, conventional planning processes, is the interactive visualization of the building model. Although planning processes are accompanied by uncertainties and fuzziness, these characteristics are neglected in current visualizations: Building Information Models appear to be accurate and truthful. Hence, BIM-based decision- and communication processes are often based on insufficient information. As a result, the investigation regarding the visualization of fuzziness is relevant for the improvement of the planning quality to achieve the goals in a building project. In this thesis, a proposal for a fuzziness visualization for the BIM-based planning process is elaborated. For this, the concept of fuzziness is defined and categorized in the context of the BIM-based planning process and potential visualization techniques are reviewed. Finally, the intuitiveness of the developed visualization approach is evaluated by conducting a survey. The major results are that adequate fuzziness visualization depends on the tasks to carry out and some of the developed visualizations require additional explanations to be understood.     «

Planning mistakes represent a major reason for project risks in construction projects and the responsibilities concerning the major costs are located in early design phases. Thus, the improvement of planning-/ design quality is relevant for the achievement of project goals regarding costs, quality and time. The iterative nature, insufficient knowledge and further restrictions of the planning process lead to uncertainties and fuzziness respective to the development and selection of adequate alter...     »