Analysis of The Impact of Material Distribution Delays on Time And Cost in The Preservation Work of The Raja Alam Road Area, Teluk Bayur District, Berau Regency

Abstract

The construction sector plays a key role in improving community welfare by providing essential infrastructure such as roads, bridges, schools, and healthcare facilities. In Indonesia, infrastructure development is a national priority, but construction projects often face challenges, including delays in material distribution that can disrupt performance. This study examines how such delays affect cost, profit, and completion time in the Preservation Work Project of the Raja Alam Road Area, Teluk Bayur District, Berau Regency. The analysis uses primary data from field observations and interviews, as well as secondary data like the Budget Plan (RAB) and material distribution records. Both qualitative and quantitative methods are applied, focusing on changes in effective working hours and their impact on material usage, costs, and execution time. Findings show that delays reduce effective working hours—from 7 to 6, 5, and even 4 hours per day. This decrease raises the coefficients for material needs and increases project costs. For example, drainage excavation costs rose from Rp 5,535,330.00 at 6 working hours to Rp 7,642,046.00 at 4 hours. The delays also impact profit. With a contract value of Rp 12.4 billion and a target profit of 5%, delays can reduce net profit by Rp 15.5 million or 2.49%. Moreover, daily productivity drops, which extends the project’s completion schedule. The study highlights that timely material delivery is essential to maintain cost efficiency, profit margins, and on-time project completion.