Work

Spatial analysis and complexity evaluation for predicting rebar installation duration

Year: 2025

Type: article

Abstract: Poor predictability of construction project duration and stagnant labor productivity highlight the need for scalable, data-driven monitoring solutions. This paper investigates how the relationship between activity complexity and duration can be quantified and leveraged. A grid-based spatial analysis is introduced to address this gap, combining BIM-derived complexity metrics for individual components (e.g., slabs) with CV-based as-performed activity classification, demonstrated in the context of rebar installation. The proposed activity classification model, ViTPoseActivity , achieves 97% accuracy in detecting on-site tasks using single-frame posture features. Correlation analysis on real-world construction data covering over 1,900 labor hours confirms a measurable positive relationship between activity complexity and duration. By combining as-designed and as-performed data in a spatial context, this paper provides a foundation for activity duration prediction, supporting proactive planning and future research in data-driven site management.

Source: Automation in Construction

DOI: 10.1016/j.autcon.2025.106462

Authors: Fabian Pfitzner, Alexander Braun, André Borrmann, Frédéric Bosché

Institutions: Technical University of Munich, University of Edinburgh

Language: English

Topic: BIM and Construction Integration

Subfield: Building and Construction

Field: Engineering

Domain: Physical Sciences

SDG: Industry, innovation and infrastructure

Open Access status: hybrid

Estimated APC paid: $5,490