S. Marsudi, R.D. Lufira, M.A. Sajali, A. Pamungkas
Port infrastructure underpins connectivity and economic resilience in archipelagic settings. This study examines schedule cost optimization for the Landing Craft Machine (LCM) Jetty Extension at Gilimanuk Port, Indonesia, to mitigate congestion and improve maritime throughput. A quantitative descriptive design was applied using secondary project data. Work volumes, unit prices, resources, and dependencies were modelled, with resource levelling preceding scenario analysis. Three acceleration strategies were evaluated: daily overtime (+1 hour), additional equipment, and their combination. The baseline plan spanned 531 days at $12.625.448. Overtime shortened the schedule by 20 days and saved 0.49% of cost. Equipment addition reduced 15 days with 0.14% savings. The combined strategy performed best, cutting 35 days (to 496 days) and lowering cost by 0.97% (to $12.502.426). Findings show that integration of labour and plant measures yields superior time cost performance relative to single levers, while levelling is an enabling step that mitigates resource conflict. The acceleration should be paired with fatigue control, Quality Control on fast-tracked work fronts, and continuous earned-value monitoring to sustain performance. The approach is replicable for marine infrastructure under budget constraints. © 2026 Published under licence by IOP Publishing Ltd.
Water Resources Engineering Department, Faculty of Engineering, Universitas Brawijaya, Malang, Indonesia
