Analysis of the Impact of Material Distribution Delays on the Time and Cost of Follow-Up Works for the Revitalization of Pedestrian Areas and Supporting Structures in the Karang Mulyo 2 Area, Berau Regency

Abstract

The revitalization of pedestrian areas is a component of sustainable infrastructure development that is often hindered by material distribution issues, affecting both project cost and duration. This study analyzes the impact of material distribution delays on the implementation of follow-up works in the pedestrian revitalization project on Karang Mulyo 2 Street, Berau Regency. The methods employed include analysis of the Bill of Quantities (BoQ), labor productivity assessment, and simulation of reduced working hours. The results indicate that a decrease in working hours from 7 to 4 hours per day leads to a cost increase of up to 57.8%, from IDR 36.77 billion to IDR 58.04 billion. The structural division experienced the highest cost surge, reaching 34%. Material delays also resulted in decreased productivity and project schedule setbacks. It is concluded that inefficient material distribution significantly impacts project cost and time efficiency. Adaptive logistics strategies and strengthened supply chain coordination are essential.