TY  - CONF
TI  - Feasibility of Eye-trackers for Monitoring Cognitive Load in Lean Construction 4.0
C1  - Osaka and Kyoto, Japan
C3  - Proceedings of the 33rd Annual Conference of the International Group for Lean Construction (IGLC 33)
SP  - 892
EP  - 904
PY  - 2025
DO  - 10.24928/2025/0141
AU  - Eltahan, Amira
AU  - Lee, Gaang
AU  - Hamzeh, Farook
AD  - Ph.D. Candidate, Hole School of Construction Engineering, University of Alberta, Canada
AD  - Assistant Professor, Hole School of Construction Engineering, University of Alberta, AB, Canada
AD  - Professor, Hole School of Construction Engineering, University of Alberta, AB, Canada
ED  - Seppänen, Olli 
ED  - Koskela, Lauri 
ED  - Murata , Koichi 
AB  - The dynamic nature of construction environments imposes significant cognitive demands on workers lead to loss of productivity and safety risks. Optimizing cognitive capacity aligns with lean construction principles by reducing waste, overburden and enhancing workers’ wellbeing, safety, and productivity. This study assesses the feasibility of eye-trackers for monitoring cognitive load on construction sites. Specifically, given the potential interference between the eye-tracking mechanism and the reflection or glare caused by safety goggles, a critical piece of protective equipment, the authors examined the impact of safety goggles on the signals’ quality of eye trackers. A controlled experiment was conducted to compare the eye-tracking signal quality metrics between with and without safety goggles. The results indicate that safety goggles introduced minor inaccuracies in fixation reliability (a 6% increase in fixation error) and blink detection (a 2% reduction in detection rate) but improved accuracy for dynamic tracking (a 27% reduction in tracking error) and maintained comparable recovery times. Furthermore, a questionnaire revealed reduced comfort and visual interference with safety goggles, highlighting the need for ergonomic improvements. This research supports integrating advanced sensor technologies in lean construction 4.0 and offers a pathway for developing practical tools to optimize worker performance and safety.
KW  - Continuous improvement/kaizen
KW  - Waste reduction
KW  - Wearable sensors
KW  - Safety
KW  - Lean construction 4.0
PB  - 
T2  - Proceedings of the 33rd Annual Conference of the International Group for Lean Construction (IGLC 33)
DA  - 2025/06/02
CY  - Osaka and Kyoto, Japan
L1  - http://iglc.net/Papers/Details/2335/pdf
L2  - http://iglc.net/Papers/Details/2335
N1  - Export Date: 02 June 2025
DB  - IGLC.net
DP  - IGLC
LA  - English
ER  -