Former Staff

Laurenz Bredenfeld

former Research Aide

Laurenz Bredenfeld, B.Sc.


Curriculum Vitae:


  • Since 04/2019: Study of Information Systems (degree: Master of Science), University of Duisburg-Essen, Essen, Germany
  • 04/2015 – 02/2019: Study of Information Systems (degree: Bachelor of Science), University of Duisburg-Essen, Essen, Germany

Work Experience:

  • Since 05/2019: Research Aide at the Chair of Information Systems and Strategic IT Management, University of Duisburg-Essen, Germany
  • 02/2017-05/2019: Student Assistant at the Chair of Information Systems and Strategic IT Management, University of Duisburg-Essen, Essen, Germany


  • Rehring, K.; Brée, T.; Gulden, J.; Bredenfeld, L.: CONCEPTUALIZING EA CITIES: TOWARDS VISUALIZING ENTERPRISE ARCHITECTURES AS CITIES. In: Proceedings of the 27th European Conference on Information Systems (ECIS). Stockholm & Uppsala, Sweden 2019. PDF Full text Citation Details

    Enterprise Architectures (EAs) are commonly visualized in the form of text, numbers, tables, graphs, models, and diagrams. These information visualization types are used to describe EAs in today’s organizations, but often lack an intuitive representation. In this paper, we provide another form of EA visualization utilizing the city metaphor. This spatial metaphor is suitable for visualizing complex information structures and potentially facilitates easy understanding of EAs, especially for non-IT staff. Based on a literature review and three rounds of open card sorting, we mapped eleven classes of EA objects to city elements. Our results enabled us to develop a formal language that allows an implementable and human-readable specification of various views, which we call EA City. We created an early stage 3D EA City prototype to demonstrate its applicability. Our model provides a solid foundation for further work on the city metaphor in the context of EA visualization.

  • Ahlemann, F.: Let’s get in touch - Decision making about Enterprise Architecture using 3D Visualization in Augmented Reality. In: Proceedings of the 52nd annual Hawaii International Conference on Systems Science. Hawaii, USA 2019. Citation Details

    Making informed decisions about historically grown and often complex business and Information Technology (IT) landscapes can be particularly difficult. Enterprise Architecture Management (EAM) addresses this issue by enabling stakeholders to base their decisions on relevant information about the organization’s current and future Enterprise Architectures (EAs). However, visualization of EA is often confronted with low usefulness perceptions. Informed by the cognitive fit theory (CFT), we argue that decision-makers benefit from interacting with EA visualizations using Augmented Reality (AR), because it enables a consistent task-related mental representation based on the natural use of decision-makers’ visual-spatial abilities. The goal of this paper is to demonstrate ARs suitability for EA-related decision-making. We follow the design science research (DSR) approach to develop and evaluate an AR head-mounted display (HMD) prototype, using the Microsoft HoloLens. Our results suggest that EA-related decision-making can profit from applying AR, but users find the handling of the HMD device cumbersome.