Comparative Analysis of Cost and Time in Construction Execution Between Precast and Cast In Situ Methods on the Continuation Project of Tubaan–Semurut Road Development (Revised Regional Budget) in Berau Regency

Abstract

The development of road infrastructure is a key factor in enhancing interregional connectivity, accelerating the distribution of goods and services, and supporting regional economic growth. In Berau Regency, East Kalimantan, the continuation project of the Tubaan–Semurut Road, funded through the Revised Regional Budget (APBD-P), represents one of the local government’s strategic efforts to improve accessibility and optimize the region’s potential. This study aims to analyze and compare the time and cost efficiency between two construction methods: precast and cast in situ, applied to the project. The research employs a quantitative descriptive approach, with data collected through field observations, interviews, and analysis of technical project documents. The results indicate that the precast method is superior in terms of execution time, whereas the cast in situ method is more economical in terms of direct costs. The total implementation cost using the precast method amounted to IDR 429,225,224 with a construction duration of 17 days, while the cast in situ method required a cost of IDR 367,038,549 and a duration of 37 days. Thus, the precast method provides a time saving of 20 days, albeit with a higher cost difference of IDR 62,186,675 compared to cast in situ. Based on these findings, the precast method is recommended for infrastructure projects in remote areas or those with strict time constraints, due to its advantages in time efficiency and ease of implementation. However, in situations with tighter budgetary limitations, the cast in situ method remains a relevant and viable alternative.