https://doi.org/10.24928/2026/0197

Strategic risk management through lean construction–enhanced mitigation: the Sitinjau Lauik flyover project, Indonesia

Rifki Alfrianto¹, Fitriana Prahastiwi Pramono², Achmad Luthfi Naufal³, Amy Rachmadhani Widyastuti⁴, Arif Rahman⁵, Sastria Wresniwira⁶, Gunadi Soekharjo⁷, Iwan Hermawan⁸ & Halim Wiranata⁹

Abstract

The Sitinjau Lauik Flyover Project is a strategic infrastructure initiative in West Sumatra designed to address severe geometric constraints and safety risks along a critical logistics corridor. Delivered under a Design–Build–Finance–Operate–Maintain–Transfer (DBFOM) Public–Private Partnership (PPP) scheme with an investment value of IDR 2.793 trillion (approximately USD 175 million), the project operates within a complex planning environment characterized by geotechnical instability, environmental constraints, and an aggressive construction timeline. These conditions require robust risk mitigation planning at an early project stage. This study adopts a scenario-based comparative approach to examine how Lean Construction can enhance risk mitigation planning compared to conventional practices. Using a project risk register as the primary data source, inherent and residual risk profiles are compared under two mitigation scenarios: conventional mitigation and Lean Construction–enhanced mitigation. Residual risk values are assessed through scenario-based estimation to support comparative analysis rather than predict actual performance outcomes. The results indicate that Lean Construction enhances mitigation robustness by reducing risk probability and exposure through improved planning reliability, early alignment, and constraint management. The findings suggest that Lean Construction can function as a planning-level risk mitigation enhancer, complementing conventional controls in complex infrastructure PPP projects.

Keywords

Risk management, lean construction, PPP, infrastructure project, risk mitigation.

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Reference in APA 7th edition format:

Alfrianto, R., Pramono, F. P., Naufal, A. L., Widyastuti, A. R., Rahman, A., Wresniwira, S., Soekharjo, G., Hermawan, I. & Wiranata, H.. (2026). Strategic risk management through lean construction–enhanced mitigation: the Sitinjau Lauik flyover project, Indonesia. 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. 1631–1641). https://doi.org/10.24928/2026/0197

Shortened reference for use in IGLC papers:

Alfrianto, R., Pramono, F. P., Naufal, A. L., Widyastuti, A. R., Rahman, A., Wresniwira, S., Soekharjo, G., Hermawan, I. & Wiranata, H.. (2026). Strategic risk management through lean construction–enhanced mitigation: the Sitinjau Lauik flyover project, Indonesia. IGLC34. https://doi.org/10.24928/2026/0197