<![CDATA[River protection infrastructure requires effective cost and schedule control because construction delays can increase expenditures and reduce project performance. This study aimed to evaluate the cost and schedule performance of the Mbambang River gabion construction project in Malang Regency using the Earned Value Method (EVM). A quantitative applied research design was employed using primary data obtained from field observations, project implementation records, and construction documentation, along with secondary data consisting of project schedules, budgets, progress reports, and the work breakdown structure. Project performance was assessed using the Budgeted Cost for Work Scheduled (BCWS), Budgeted Cost for Work Performed (BCWP), Actual Cost for Work Performed (ACWP), Cost Variance (CV), Schedule Variance (SV), Cost Performance Index (CPI), and Schedule Performance Index (SPI). The results showed that gabion installation experienced significant schedule delays and cost inefficiency, with an SPI of 0.40, CPI of 0.90, SV of ?Rp1,391,064,088, and CV of ?Rp103,333,416. Nonwoven geotextile installation performed closer to the planned schedule but remained cost-inefficient, recording an SPI of 0.95, CPI of 0.91, SV of ?Rp1,966,686, and CV of ?Rp4,110,373. These findings demonstrated that both activities experienced schedule and cost deviations, although the magnitude of the deviations differed. The study concluded that EVM provides an effective early-warning framework for identifying project performance deviations and supporting timely corrective decisions in river infrastructure construction.]]>
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