TY  - CONF
TI  - Quality Assurance of Prefabricated Concrete Elements
C1  - Osaka and Kyoto, Japan
C3  - Proceedings of the 33rd Annual Conference of the International Group for Lean Construction (IGLC 33)
SP  - 669
EP  - 680
PY  - 2025
DO  - 10.24928/2025/0130
AU  - Jørgensen, Oskar
AU  - Lædre, Ola
AU  - Lohne, Jardar
AD  - MSc, Department of Civil and Environmental Engineering, NTNU, Trondheim, Norway/Project Engineer, HAB Construction AS, Vollsveien 19, N-1366 Lysaker, Norway, oskar@hab.no
AD  - Professor, dr.ing, Department of Civil and Environmental Engineering, NTNU, ola.laedre@ntnu.no,
orcid.org/0000-0003-4604-8299
AD  - Research Scientist, dr.art., Department of Civil and Environmental Engineering, NTNU, Jardar.lohne@ntnu.no, orcid.org/0000-0002-2135-3468
ED  - Seppänen, Olli 
ED  - Koskela, Lauri 
ED  - Murata , Koichi 
AB  - Workplace crime in Norway’s construction industry is a growing concern, with social dumping, poor working conditions, and economic crime identified as major issues. Counterfeit materials and their risks to the environment, safety, and health receive less attention. Little research has examined how quality assurance (QA) systems in the prefabricated concrete supply chain address these risks. Quality failures pose a substantial threat to Lean Construction practices. This exploratory research aims to answer how QA systems in the value chain of precast concrete elements can be improved. This was investigated through 10 interviews, focusing on the strengths and weaknesses of current QA systems. The QA systems of producers, contractors, and clients include factory visits, deviation management systems, audits, and certification checks. Most interviewees believe the industry is well-regulated and not likely to produce false materials, though one noted that "if they want to trick us, they can". Key weaknesses include untested materials, trust-based inspections, emissions manipulation, and lack of destructive testing. Taking into account limits to generalization, the study identified 24 improvement measures, targeting suppliers, producers, transporters, installers, contractors, and clients. Recommendations focus on addressing these gaps to strengthen QA systems and expanding the analysis to other materials in the supply chain.
KW  - Lean construction
KW  - prefabrication
KW  - concrete elements
KW  - quality assurance
KW  - counterfeit.
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/2326/pdf
L2  - http://iglc.net/Papers/Details/2326
N1  - Export Date: 02 June 2025
DB  - IGLC.net
DP  - IGLC
LA  - English
ER  -