TY  - CONF
TI  - Enhancing sustainability in Indonesian dam construction: a lean optimization approach
AU  - Napitupulu, Ferdinand
AU  - Irtanto, Edi
AD  - Project Manager, Infrastructure 2 & Building Division, PT. Wijaya Karya (Persero) Tbk., Jakarta, Indonesia. ferdinand.napitupulu@wikamail.id, orcid.org/0009-0007-3089-7671
AD  - Project Engineering Manager, Infrastructure 2 & Building Division, PT. Wijaya Karya (Persero) Tbk., Jakarta, Indonesia. edi.irtanto@wikamail.id, orcid.org/0009-0004-1522-4717
ED  - Hamzeh, Farook
ED  - Poshdar, Mani
ED  - Garcia-Lopez,, Nelly P.
ED  - Gan, Vincent
PY  - 2026
DA  - 2026/06/22
T2  - Proceedings of the 34th Annual Conference of the International Group for Lean Construction (IGLC 34)
C3  - Proceedings of the 34th Annual Conference of the International Group for Lean Construction (IGLC 34)
CY  - Singapore, Singapore
SP  - 473
EP  - 481
DO  - 10.24928/2026/0182
SN  - 2789-0015 (ISSN)
AB  - 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.
KW  - Last Planner System
KW  - lean construction
KW  - waste reduction
KW  - dam construction
KW  - sustainable infrastructure.
L1  - https://www.iglc.net/papers/details/2490/pdf
UR  - https://www.iglc.net/papers/details/2490
DB  - IGLC.net
LA  - English
N1  - Export date: 04 October 2026
ER  -