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Technische Universität München

Dr.-Ing. Alexander Braun

Current affiliation

Executive Vice President Digitalization and IT Systems and Chief Information Officer (CIO) at TUM

Group Lead Digital Twinning in the Built Environment

Contact

For any request regarding my role as Senior Vice President and CIO of TUM you can find my contact details in the internal systems.

General requests can be sent to cio AT tum.de (no sales).

For meeting requests, please contact the presidents office:

praesident-termine AT tum.de

Research and chair related requests can be sent to:

cms@ed.tum.de

Research profiles

OrcID: 0000-0003-1513-5111

Scopus: 23396226500 

Google Scholar: 4uK-JTMAAAAJ

WoS: IQS-3481-2023

Research

  • Digital Twinning projects
  • Development of an automated method for construction progress monitoring by integrating point clouds and 4D Building Information Modeling
  • BIM4INFRA2020 - Umsetzung des Stufenplans "digitales Planen und Bauen"

Visiting researcher @ CyberBuild (University of Edinburgh, Dr. Frédéric Bosché, May 2019)

Reviewer for International Journals

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2026

  • Mehranfar, M.; Braun, A.; Borrmann, A.; Heeramaglore, M.; Kolbe, T. H.; Chen, Z.; Zhu, X. X.: Automatic alignment of semantic building models with digital city models through multi-level point cloud semantic segmentation and registration using PSO optimization: A case study of the TUM main campus. International Journal of Applied Earth Observation and Geoinformation 147, 2026, 105191 mehr…

2025

  • Mehranfar, M.; Braun, A.; Borrmann, A.; Turkan, Y.: Automated Bottom-Up, Top-Down Method for Creating Digital Staircase Models from Dense Point Clouds Using Parametric Prototype Models and Model Fitting. Journal of Information Technology in Construction 30, 2025, 989-1016 mehr…
  • Pfitzner, F.; Braun, A.; Borrmann, A.; F., Bosché: Spatial analysis and complexity evaluation for predicting rebar installation duration. Automation in Construction 179, 2025, 106-462 mehr…
  • Pfitzner, F.; Hu, S.; Braun, A.; Borrmann, A.; Fang, Y.: Monitoring concrete pouring progress using knowledge graph-enhanced computer vision. Automation in Construction 174, 2025, 106-117 mehr…

2024

  • Mehranfar, M.; Braun, A.; Borrmann, A.: From dense point clouds to semantic digital models: End-to-end AI-based automation procedure for Manhattan-world structures. Automation in Construction 162, 2024, 105392 mehr…
  • Mehranfar, M.; Vega-Torres, M.; Braun, A.; Borrmann, A: Automated data-driven method for creating digital building models from dense point clouds and images through semantic segmentation and parametric model fitting. Advanced Engineering Informatics 62 (Part A), 2024, 10264 mehr…
  • Noichl, F.; Collins, F. C.; Braun, A.; Borrmann, A.: Enhancing point cloud semantic segmentation in the data-scarce domain of industrial plants through synthetic data. Computer-Aided Civil and Infrastructure Engineering 39 (10), 2024, 1530-1549 mehr…
  • Pfitzner, F.; Braun, A.; Borrmann, A.: From data to knowledge: Construction process analysis through continuous image capturing, object detection, and knowledge graph creation. Automation in Construction 164, 2024, 105451 mehr…
  • Vega-Torres, Miguel A; Braun, Alexander; Borrmann, André: SLAM2REF: advancing long-term mapping with 3D LiDAR and reference map integration for precise 6-DoF trajectory estimation and map extension. Construction Robotics 8 (2), 2024, 13 mehr…

2023

  • Pan, Y.; Braun, A.; Borrmann, A.; I., Brilakis: 3D deep-learning-enhanced void-growing approach in creating geometric digital twins of buildings. Smart Infrastructure and Construction 176 (1), 2023, 24-40 mehr…
  • Schlenger, J.; Pfitzner, F.; Braun, A.; Vilgertshofer, S.; Borrmann, A.: Digitaler Zwilling Baustelle – Baustellenüberwachung zur automatisierten Zeit- und Kostenkontrolle. Bautechnik 100 (4), 2023, 190-197 mehr…

2022

  • Collins, F. C; Ringsquandl, M.; Braun, A.; Hall, D. M; Borrmann, A.: Shape encoding for semantic healing of design models and knowledge transfer to Scan-to-BIM. Proceedings of the Institution of Civil Engineers - Smart Infrastructure and Construction 175 (4), 2022, 1-21 mehr…
  • Pan, Y.; Braun, A.; Brilakis, I.; Borrmann, A.: Enriching geometric digital twins of buildings with small objects by fusing laser scanning and AI-based image recognition. Automation in Construction 140, 2022, 104375 mehr…

2021

  • Vega Torres, M.A.; Braun, A.; Noichl, F.; Borrmann, A.; Bauer, H.; Wohlfeld, D.: Recognition of temporary vertical objects in large point clouds of construction sites. Proceedings of the Institution of Civil Engineers - Smart Infrastructure and Construction 174 (4), 2021, 134-149 mehr…

2020

  • Braun, A.; Tuttas, S.; Stilla, U.; Borrmann, A.: Improving progress monitoring by fusing point clouds, semantic data and computer vision. Automation in Construction 116 (116), 2020, 103210 mehr…

2019

  • Braun, A.; Borrmann, A.: Combining inverse photogrammetry and BIM for automated labeling of construction site images for machine learning. Automation in Construction 106, 2019, 1-13 mehr…

2017

  • Tuttas, S.; Braun, A.; Borrmann, A.; Stilla, U.: Acquisition and Consecutive Registration of Photogrammetric Point Clouds for Construction Progress Monitoring Using a 4D BIM. PFG – Journal of Photogrammetry, Remote Sensing and Geoinformation Science 85 (1), 2017, 3-15 mehr…

2015

  • Braun, A.; Tuttas, S.; Borrmann, A.; Stilla, U.: A concept for automated construction progress monitoring using BIM-based geometric constraints and photogrammetric point clouds. ITcon 20 (8), 2015, 68-79 mehr…

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2026

  • Pfitzner, F., Braun, A., Borrmann, A.: Towards Long-Term Construction Activity Monitoring Using Multi-View Vision Transformers. Proc. of the Int. Conf. on Computing in Civil and Building Engineering (ICCCBE) 2026, 2026 mehr…

2025

  • Mehranfar, M.; Braun, A.; Borrmann, A.: A hybrid bottom-up top-down AI method for improved digital twinning of the buildings using point cloud data and RGB images. Proc. of the European Conference on Computing in Construction (EC3), 2025 mehr…

2024

  • Mehranfar, M.; Braun, A.; Borrmann, A.: Automated Geometric-Semantic Digital Twinning of Staircase From Dense Laser Scanner Point Clouds by Parametric Prototype Models. European Conference on Computing in Construction, 2024 mehr…
  • Mehranfar, M.; Braun, A.; Borrmann, A.: Artificial Intelligence For Automated Digital Twinning of Buildings. GNI Symposium & Expo on Artificial Intelligence for the Built World, 2024 mehr…
  • Noichl, F.; Braun, A.; Borrmann, A.: Leveraging Spatial Orientation for Point Cloud Instance Segmentation and Pose Detection in Structural and MEP Systems. Proc. of the ASCE International Conference on Computing in Civil Engineering, 2024 mehr…
  • Pfitzner, F.; Braun, A.; Bosché, F.; A., Borrmann: ViTPoseActivity: A Multifaceted Computer Vision Approach to On-Site Activity Monitoring. Proc. of the CIB W78 conference 2024, 2024 mehr…
  • Pfitzner, F.; Hu, S.; Braun, A.; Borrmann, A.; Y., Fang: Monitoring Concrete Pouring With Knowledge Graph-Enhanced Computer Vision: A Case Study From Munich. Proc. of EC3 2024, 2024 mehr…

2023

  • Borrmann, A.; Biswanath, M.; Braun, A.; Zhaiyu, C.; Cremers, D.; Heeramaglore, M.; Hoegner, L.; Mehranfar, M.; Kolbe, T.; Petzold, F.; Rueda, A.; Solonets, S.; Zhu, Z.: Artificial Intelligence for the automated creation of multi-scale digital twins of the built world – AI4TWINNING. Proc. of the 18th 3D GeoInfo Conference, 2023 mehr…
  • Collins, F.C.; Braun, A.; Borrmann, A.: Graph-based linking of point cloud and BIM elements for extended DT integration. Proc. of the 30th Int. Conference on Intelligent Computing in Engineering (EG-ICE), 2023 mehr…
  • Mehranfar, M.; Braun, A.; Borrmann, A.: Automatic creation of digital building twins with rich semantics from dense RGB point clouds through semantic segmentation and model fitting. Proc. of the 30th Int. Conference on Intelligent Computing in Engineering (EG-ICE), 2023 mehr…
  • Noichl, F.; Pan, Y.; Mafipour, M. S.; Braun, A.; Brilakis, I.; Borrmann, A.: From enriched point cloud to structural and MEP models: An automated approach to create semantic-geometric models for industrial facilities. Proc. of the ASCE International Conference on Computing in Civil Engineering, 2023 mehr…
  • Pfitzner, F.; Braun, A.; Borrmann, A.: Object Detection Based Knowledge Graph Creation: Enabling Insight into Construction Processes. Proc. of the ASCE International Conference on Computing in Civil Engineering 2023, 2023 mehr…
  • Vega-Torres, M.A.; Braun, A.; Borrmann, A.: BIM-SLAM: Integrating BIM Models in Multi-session SLAM for Lifelong Mapping using 3D LiDAR. Proc. of the 40th International Symposium on Automation and Robotics in Construction (ISARC 2023), 2023 mehr…

2022

  • Collins, F.C.; Braun, A.; Borrmann, A.: Finding geometric and topological similarities in building elements for large-scale pose updates in Scan-vs-BIM. Proc. of the Int. Conf. on Computing in Civil and Building Engineering (ICCCBE), 2022 mehr…
  • Mehranfar, M.; Braun, A.; Borrmann, A.: A hybrid top-down, bottom-up approach for 3D space parsing using dense RGB point clouds. Proc. of European Conference on Product and Process Modeling 2022, 2022 mehr…
  • Pan, Yuandong; Noichl, Florian; Braun, Alexander; Borrmann, André; Brilakis, Ioannis: Automatic Creation and Enrichment of 3D Models for Pipe Systems by Co-registration of Laser-scanned Point Clouds and Photos. Proceedings of the 2022 European Conference on Computing in Construction, 2022 mehr…
  • Pfitzner F., Braun A., Borrmann A.: Towards data mining on construction sites: Heterogeneous data acquisition and fusion. Proc. of European Conference on Product and Process Modeling 2022, 2022 mehr…
  • Vega-Torres, M. A.; Braun, A.; Borrmann, A.: Occupancy Grid Map to Pose Graph-based Map: Robust BIM-based 2D- LiDAR Localization for Lifelong Indoor Navigation in Changing and Dynamic Environments. Proc. of European Conference on Product and Process Modeling 2022, 2022 mehr…

2021

  • Collins, F.; Braun, A.; Ringsquandl, M.; Hall, D.; Borrmann, A.: Assessing IFC classes with means of geometric deep learning on different graph encodings. Proc. of the 2021 European Conference on Computing in Construction, 2021 mehr…
  • Noichl, F.; Braun, A.; Borrmann, A.: "BIM-to-Scan" for Scan-to-BIM: Generating Realistic Synthetic Ground Truth Point Clouds based on Industrial 3D Models. Proceedings of the 2021 European Conference on Computing in Construction, 2021 mehr…
  • Pan, Y.; Braun, A.; Borrmann, A.; I., Brilakis: Void-growing: a novel Scan-to-BIM method for manhattan world buildings from point cloud. Proceedings of the 2021 European Conference on Computing in Construction, 2021 mehr…
  • Vega, M.; Braun, A.; Bauer, H.; Noichl, F.; Borrmann, A.: Efficient Vertical Object Detection in Large High-Quality Point Clouds of Construction Sites. Proc. of the 2021 European Conference on Computing in Construction, 2021 mehr…

2019

  • Abualdenien, J.; Pfuhl, S.; Braun, A.: Development of an MVD for checking fire-safety and pedestrian simulation requirements. Proc. of the 31th Forum Bauinformatik, 2019 mehr…
  • Forth, K.; Braun, A.; Borrmann, A.: BIM-integrated LCA - model analysis and implementation for practice. Sustainable Built Environment D-A-CH Conference 2019, 2019 mehr…

2018

  • Braun, A.; Tuttas, S.; Stilla, U.; Borrmann, A.: Process- and computer vision-based detection of as-built components on construction sites. Proc. of the 35nd ISARC 2018, 2018 mehr…
  • Jahr, Katrin; Braun, Alex: Maschinelles Sehen für die automatische Erkennung von Baubehelfen. Proc. of the 30. Forum Bauinformatik, 2018 mehr…
  • Jahr, Katrin; Braun, Alex; Borrmann, André: Formwork detection in UAV pictures of construction sites. Proc. of the 12th European Conference on Product and Process Modelling, 2018 mehr…

2016

  • Braun, A.; Tuttas, S.; Stilla, U.; Borrmann, A.: Incorporating knowledge on construction methods into automated progress monitoring techniques. 23rd International Workshop of the European Group for Intelligent Computing in Engineering, 2016 mehr…
  • Braun, A.; Tuttas, S.; Stilla, U.; Borrmann, A.: Classification of detection states in construction progress monitoring. 11th European Conference on Product and Process Modelling, 2016 mehr…
  • Braun, A.; Vilgertshofer, S.; Daum, S.: Automatisierte Prozessneugenerierung basierend auf Ergebnissen aus der Baufortschrittskontrolle. Proc. of the 28th Forum Bauinformatik, 2016 mehr…
  • Tuttas, S.; Braun, A.; Stilla, U.; Borrmann, A.: Evaluation of acquisition strategies for image-based construction site monitoring. The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2016 mehr…

2015

  • Braun, A.; Tuttas, S.; Borrmann, A.; Stilla, U.: Automated progress monitoring based on photogrammetric point clouds and precedence relationship graphs. The 32nd International Symposium on Automation and Robotics in Construction and Mining (ISARC 2015), 2015 mehr…
  • Daum, S.; Vilgertshofer, S.; Braun, A.: Service-basierte Analyse von Bauwerksmodellen: der QL4BIM Server. Proc. des 27. Forum Bauinformatik, 2015 mehr…
  • Tuttas, S.; Braun, A.; Borrmann, A.; Stilla, U.: Validation of BIM components by photogrammetric point clouds for construction site monitoring. ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Volume II-3/W4, 2015, 2015 mehr…

2014

  • Braun, A.; Tuttas, S.; Borrmann, A.; Stilla, U.: Towards automated construction progress monitoring using BIM-based point cloud processing. eWork and eBusiness in Architecture, Engineering and Construction: ECPPM 2014, 2014 mehr…
  • Daum, S.; Braun, A.: BIM-basierte Bauprozessplanung: Automatisierte Ableitung von Precedence Relationships durch eine räumliche Anfragesprache. Proc. des 26. Forum Bauinformatik, 2014 mehr…
  • Tuttas, S.; Braun, A.; Borrmann, A.; Stilla, U.: Comparison of photogrammetric point clouds with BIM building elements for construction progress monitoring. The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Volume XL-3, 2014 mehr…
  • Tuttas, S.; Braun, A.; Borrmann, A.; Stilla, U.: Konzept zur automatischen Baufortschrittskontrolle durch Integration eines Building Information Models und photogrammetrisch erzeugten Punktwolken. DGPF Tagungsband 23 / 2014, 2014 mehr…

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2023

  • Wunderskirchner, L.: Case study on BIM based process modeling: Fundamentals, implementation and software comparison. Bachelor's thesis, 2023 mehr…

2021

  • Bralic, S.: First responders' pathway requirements in perilous incidents. Bachelor's thesis, 2021 mehr…
  • Kiral, Alperen: Automated Calibration Methods for Digital Production Twins. , 2021 mehr…
  • Müller, Bernhard: Business Innovation Framework for Industrialized Construction. , 2021 mehr…
  • Pfitzner, F.: Data Mining within the as-performed construction process. , 2021 mehr…

2020

  • Altmann, L.: BIM und LCM – Chancen, Synergien sowie eine mögliche Interaktion zwischen beiden Systemen anhand eines Praxisbeispiels über die Visualisierung eines Neubaus, dem iCampus im Münchner Werksviertel. Bachelor's thesis, 2020 mehr…
  • Collins, F.: Encoding of geometric shapes from Building Information Modeling (BIM) using graph neural networks. , 2020 mehr…
  • Kerscher, C.: Qualitativer und quantitativer Abgleich zwischen 3D-Modellen und Punktwolken im Gerüstbau. Bachelor's thesis, 2020 mehr…
  • Popgavrilova, G.: Assuring building information quality for building analytics by translating use cases of BIM@SRE standard into the MVD format. , 2020 mehr…
  • Röschert, Yul: Digitalisierungspotentiale von Vergabeprozessen öffentlicher Auftraggeber zur Rügevermeidung am Praxisbeispiel der Vergabe von Bauleistungen im Oberschwellenbereich. Bachelor's thesis, 2020 mehr…
  • Speiser, K: Ein Ansatz zur Anreicherung und Validierung von IFC-Modellen durch das Übersetzen gegebener Daten in standardisierte Informationsanforderungen. , 2020 mehr…
  • Tietze, Felix: Rahmenbedingungen und Methoden der As-Built Dokumentation. Bachelor's thesis, 2020 mehr…
  • Vega, M.: Efficient Vertical Object Detection in Large High-Quality Point Clouds of Construction Sites. , 2020 mehr…

2019

  • Breu, T.: Point Cloud Classification as a Support for BIM-based Progress Tracking. , 2019 mehr…
  • Hölzlwimmer, V.: Prüfung von Fertigstellungsgraden in digitalen Gebäudemodellen. , 2019 mehr…

2018

  • Forth, K.: BIM-basierte Ökobilanzierung. , 2018 mehr…
  • Kirn, F.: Building Information Modeling and Virtual Reality: Editing of IFC Elements in Virtual Reality. , 2018 mehr…
  • Müller, B.: Machine Learning - based Image Segmentation. Bachelor's thesis, 2018 mehr…
  • Oppold, B.: Bewertung und Optimierung von Methoden zum automatisierten Soll-Ist-Abgleich unter Betrachtung gültiger Bauabweichungen. Bachelor's thesis, 2018 mehr…
  • Zibion, D.: Development of a BIM-enabled Software Tool for Facility Management using Interactive Floor Plans, Graph-based Data Management and Granular Information Retrieval. Masterarbeit, 2018 mehr…

2017

  • Beutelrock, M.: Bausystemschnittstellenentwicklung im industriellen Bauen. , 2017 mehr…
  • Diebl, Y.: Implementierung der Lean Prinzipien in eine BIM-Phasenmodellierung der Software Revit. Technische Universität München, 2017, mehr…
  • Kaps, C: BIM-gestützte Modellierung von Baubehelfselementen. Bachelor's thesis, 2017 mehr…
  • Koebler, K.: Untersuchung der IFC-gestützten Modellübertragung zur Ableitung von Modellierempfehlungen für Architekten. , 2017 mehr…
  • Kruse, A: BIM-Integriertes Lean Management und BIM-gestützte Ausbau-/Fassadenmodellierung in Autodesk Revit. Bachelor's thesis, 2017 mehr…
  • Lukas, A: Datenerfassung mittels unbemannter Flugobjekte im Hinblick auf eine automatisierte Baufortschrittskontrolle. Bachelor's thesis, 2017 mehr…
  • Nguyen, Thu: 3D-Bestandsscanning eines Mehrfamilienhauses als Grundlage für eine energetische Bewertung. Bachelor's thesis, 2017 mehr…
  • Schirmer, S.: Teilautomatisierte Modellierung von Baubehelfen und Konstruktionsmaterial. Bachelor's thesis, 2017 mehr…

2016

  • Hecht, Helge: A GPU Based Approach for As-Planned versus As-Built Comparison in the Scope of Automated BIM Based Construction Progress Monitoring. Bachelor's thesis, 2016 mehr…
  • Kunkel, H.: Digitales Bauen - Integration von projektorientierten Informationssystemen im schlüsselfertigen Hochbau. , 2016 mehr…
  • Rohrmann, J.: Optimierte BIM-Modellierung zur Unterstützung der automatisierten Baufortschrittskontrolle. Bachelor's thesis, 2016 mehr…
  • Sedlmair, M.: Auswirkungen von Änderungen im Bauablauf auf den Prozessplan und Entwicklung einer Terminanpassungs-Software. Bachelorarbeit, 2016 mehr…

2015

  • Barth, A.: Webbasierte Prozessvisualisierung mit Hilfe eines 4D Modells. Bachelor's thesis, 2015 mehr…
  • Braunert, W.: Erstellung einer 4D-Bauablaufsimuation auf Grundlage von 2D. Bachelor's thesis, 2015 mehr…
  • Gun, S.: BIM-basierte statische Analyse am Beispiel der TU Mensa. Bachelorarbeit, 2015 mehr…
  • Kostka, K.: Bauteilidentifikation mit GUIDs in Autodesk Revit. Bachelor's thesis, 2015 mehr…

2014

  • Brill, M.: Modellierung und kollaboratives Arbeiten mit aktueller BIM-Software am Beispiel des Forschungszentrums TranslaTUM. Bachelor's thesis, 2014 mehr…

2013

  • Hofmeier, M.: Entwicklung einer Software zur Soll/Ist-Bauablaufvisualisierung mit IFC-Schnittstelle. , 2013 mehr…
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