TY  - CONF
TI  - A Lean Approach to Productivity Improvement in Roof Panel Manufacturing for Modular Off-site Construction Using DfMA and Emerging Technologies
AU  - Mehdipoor, Amirhossein
AU  - Hajiagha, Arash Rohani
AU  - Mehdipoorkaloorazi, Sahar
AU  - Iordanova, Ivanka
AD  - Research Officer, National Research Council (NRC) Canada, Ottawa, Canada, amirhossein.mehdipoor@nrc-cnrc.gc.ca, https://orcid.org/0000-0002-9889-2478
AD  - Graduate Student, Department of Construction Engineering, École de Technologie Supérieure (ÉTS), Montreal, Canada, arash.rohani-hajiagha.1@ens.etsmtl.ca
AD  - Engineer, Falcon Structures Inc., Montreal, Canada, sahar.mehdipour70@gmail.com.
AD  - Professor, Department of Construction Engineering, École de Technologie Supérieure (ÉTS), Montreal, Canada, ivanka.iordanova@etsmtl.ca, https://orcid.org/0000-0002-4596-2604
ED  - Seppänen, Olli
ED  - Koskela, Lauri
ED  - Murata, Koichi
PY  - 2025
DA  - 2025/06/02
T2  - Proceedings of the 33rd Annual Conference of the International Group for Lean Construction (IGLC 33)
C3  - Proceedings of the 33rd Annual Conference of the International Group for Lean Construction (IGLC 33)
CY  - Osaka and Kyoto, Japan
SP  - 787
EP  - 798
DO  - 10.24928/2025/0189
SN  - 2789-0015 (ISSN)
AB  - The study investigates the application of Lean Construction principles to enhance productivity in modular off-site construction, specifically focusing on roof panel production. A systematic framework was developed, emphasizing Standardization, Elimination of Waste, Continuous Improvement, and Minimization of Time and Effort, which was tested through a real-world case study. Conducted at a modular offsite construction project in Montreal, Canada, the study involved light gauge steel structure panels covering a total gross floor area of 2,500 square meters. The adoption of lean practices resulted in a notable 32% improvement in labor productivity.  Key strategies contributing to this success included the use of Design for Manufacture and Assembly tools, semi-automation, augmented reality for quality checks, and the 5S methodology (Sort, Set in order, Shine, Standardize, and Sustain). These strategies collectively minimized waste, streamlined production processes, and enhanced labor efficiency.  The findings validate the effectiveness of the proposed framework and offer a replicable model for future modular construction projects aiming for productivity enhancement. By integrating these lean principles, the study provides a proper approach to improving efficiency and quality in modular construction environments, setting a benchmark for subsequent projects in the industry.
KW  - Lean Construction Principles
KW  - Modular Off-site Construction
KW  - Productivity
KW  - DfMA
L1  - https://www.iglc.net/papers/details/2364/pdf
UR  - https://www.iglc.net/papers/details/2364
DB  - IGLC.net
LA  - English
N1  - Export date: 04 October 2026
ER  -