<![CDATA[General Background Floating power station construction requires highly structured manufacturing workflows to deliver clean energy infrastructure reliably. Specific Background Barge Mounted Power Plant (BMPP) fabrication in shipyards operates under job shop environments with complex assembly sequences and extended production cycles. Knowledge Gap Although workflow mapping tools clarify manufacturing stages, operational bottlenecks and supply chain disruptions during initial production phases of specialized barges remain insufficiently detailed in empirical literature. Aims This study analyzes the production process of the 150MW BMPP project at PT PAL Indonesia using operation process charts and flow diagrams to resolve operational constraints. Results Direct field observations reveal that unmaintained production facilities trigger power instabilities, inter-divisional distances extend material transfer duration, and raw steel import restrictions cause schedule misalignment. Novelty Integrating standardized process mapping with multi-factorial constraint analysis offers a practical diagnostic framework tailored specifically to barge-mounted power facility manufacturing. Implications Establishing preventative equipment maintenance, improving inter-departmental communication, and optimizing facility layout minimize process delays and strengthen delivery compliance in heavy shipyard engineering. Key Findings Highlights Operation process mapping identifies key structural stages in floating power plant construction. Facilities maintenance deficiencies and long inter-divisional distances extend total production time. Import policy restrictions create material delivery shifts that disturb baseline manufacturing schedules. Keywords: Barge Mounted Power Plant, Operation Process Chart, Process Flow Diagram, Production Bottleneck, Shipyard Manufacturing]]>
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