چكيده به لاتين
The construction industry in Iran has significantly contributed to the country’s economic landscape. Notably, large-scale housing projects have constituted a substantial portion of this contribution. Recent years have witnessed a growing demand for housing construction and allocation, driven by legislative initiatives enacted in 2021 (1400 SH). However, despite this growth, the adoption of traditional construction methods over modern approaches has hindered overall productivity in the Iranian construction sector.
This study investigates the impact of employing innovative construction tools, particularly the Last Planner System (LPS), on enhancing efficiency. The widespread availability of these tools, coupled with their diverse applications, presents challenges in selecting the most suitable tool for each project context. To address this, we propose guidelines for the effective utilization of these tools.
In a case study, we implemented the Last Planner System for the first time in a large-scale housing construction project in new cities across Iran. The implementation involved six key steps, including on-site engagement with subcontractors, color-coding tasks on the Kanban board, conducting weekly and monthly meetings, measuring weekly progress against the plan, analyzing reasons for deviations, and categorizing these reasons using a fishbone diagram.
Data collection spanned four consecutive weeks and employed visual observation, video recording, verbal interactions with site supervisors and subcontractor team leaders, and oral interviews with executive engineers and management personnel.
The study’s findings reveal an average weekly improvement of 25% in meeting subcontractor commitments. Key factors contributing to unmet targets include inadequate training, unfamiliarity with best practices and innovative tools, lack of commitment among subcontractors, resistance to change, and financial resource constraints.
