https://doi.org/10.24928/2026/0182
Enhancing sustainability in Indonesian dam construction: a lean optimization approach
Ferdinand Napitupulu1 & Edi Irtanto2
1Project Manager, Infrastructure 2 & Building Division, PT. Wijaya Karya (Persero) Tbk., Jakarta, Indonesia. [email protected], orcid.org/0009-0007-3089-76712Project Engineering Manager, Infrastructure 2 & Building Division, PT. Wijaya Karya (Persero) Tbk., Jakarta, Indonesia. [email protected], orcid.org/0009-0004-1522-4717
Abstract
Dams represent critical infrastructure supporting Indonesia’s food security, energy supply, flood control, and water resource management. Yet dam construction projects frequently experience time and cost overruns due to process inefficiencies, rework, and inadequate coordination among stakeholders. To enhance performance and sustainability, this study investigates the application of Lean Construction (LC) principles—particularly the Last Planner System (LPS)—as a systematic approach to waste reduction and process optimization in dam construction. Using an explanatory sequential mixed-method design (interviews, site observations, document analysis) on an ongoing dam project in Indonesia, the results show that LPS improves workflow reliability and reduces non–value-added activities, yielding measurable gains in schedule adherence, cost efficiency, productivity, and environmental sustainability through a 10–15% reduction in material waste. Key success factors include commitment-based planning, early constraint identification, and enhanced stakeholder collaboration. The study contributes a practical framework for integrating LC tools to achieve sustainable performance outcomes in complex project environments aligned with national infrastructure goals and optimize resource utilization.
Keywords
Last Planner System, lean construction, waste reduction, dam construction, sustainable infrastructure.
Files
Reference
Download: BibTeX | RIS Format
Reference in APA 7th edition format:
Napitupulu, F. & Irtanto, E.. (2026). Enhancing sustainability in Indonesian dam construction: a lean optimization approach. In Hamzeh, F., Poshdar, M., & Garcia-Lopez,, N. P. (Eds.), Proceedings of the 34th Annual Conference of the International Group for Lean Construction (IGLC 34) (pp. 473–481). https://doi.org/10.24928/2026/0182
Shortened reference for use in IGLC papers:
Napitupulu, F. & Irtanto, E.. (2026). Enhancing sustainability in Indonesian dam construction: a lean optimization approach. IGLC34. https://doi.org/10.24928/2026/0182
Founded in 1993, the IGLC is an international network of researchers from practice and academia in architecture, engineering, and construction (AEC) who feel that the practice, education, and research of the AEC industry have to be radically renewed in order to respond to the global challenges ahead.
2015 © All Rights Reserved.