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All Journal Zona Laut : Jurnal Inovasi Sains dan Teknologi Kelautan
Juswan Sade
Departement of Ocean Engineering. Hasanuddin University, Indonesia
Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Energy Engineering Transportation

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Analysis of Paint Material Requirements and Repair Costs for the KMP Balibo Ferry Nurul Haslindah; Juswan Sade
Zona Laut : Jurnal Inovasi Sains Dan Teknologi Kelautan Volume 7, Issue 1, March 2026 Edition
Publisher : Departemen Teknik Kelautan Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62012/zl.vi.48309

Abstract

The shipping industry is a crucial sector supporting maritime transportation in Indonesia, making ship maintenance and repair a vital requirement to ensure operational safety and efficiency. Painting is a crucial aspect of repair, protecting the ship's structure from corrosion while simultaneously reducing operational costs. This study aims to analyze the paint material requirements and painting costs for the KMP. Balibo ferry using the Just In Time (JIT) approach. This study provides a comprehensive overview of the calculation of material requirements and painting costs for the ship, while also offering a more effective inventory management strategy for the Indonesian shipbuilding industry. The primary data used include ship specifications, paint coating types, and material prices from official references. The analysis method is carried out by calculating the painting area, paint volume requirements, thinner, and material cost estimates based on the Dry Film Thickness, Solid Volume, Theoretical Spreading Rate, and paint loss factors. The results show that the total paint and thinner requirements can be estimated accurately, with a total cost of Rp 310.000.000. The implementation of the Just In Time (JIT) method results in more efficient material delivery planning, reduces potential waste, and accelerates the repair process.
Comparative Analysis of CPM and PERT Methods for Scheduling the Repair Process of KMP. Kormomolin Ainun Jariah; Juswan Sade
Zona Laut : Jurnal Inovasi Sains Dan Teknologi Kelautan Volume 7, Issue 2, July 2026 Edition
Publisher : Departemen Teknik Kelautan Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

In the maritime industry, scheduling ship repair projects is an important aspect that determines operational efficiency and navigational safety. An appropriate scheduling method can help optimize project duration and manage uncertainties that may arise during project implementation. Two commonly used methods are the Critical Path Method (CPM) and the Program Evaluation and Review Technique (PERT), which apply deterministic and probabilistic approaches, respectively. This study was conducted on the repair project of KMP. Kormomolin, which had an initial planned duration of 52 days and involved 58 technical activities. The CPM method was used to identify the critical path based on fixed activity durations obtained from the repair list, while the PERT method was applied to estimate project duration using three-time estimates: optimistic, most likely, and pessimistic. The analysis was carried out using Microsoft Project and manual calculations to determine Early Finish (EF), Late Finish (LF), Total Float, and the probability of project completion. The CPM analysis showed that the project could be completed within 48 days, with a critical path consisting of activities with no slack. Meanwhile, the PERT method produced an estimated project duration of 50 days, with a completion probability of 95.82%. The CPM method provides stricter time control, whereas PERT offers greater flexibility in dealing with uncertainty. CPM is more suitable for projects with a stable work structure and clear activity sequences, while PERT is more appropriate for projects involving many variables and risks. The integration of both methods is recommended to produce more adaptive and comprehensive project planning in the ship repair industry.
Co-Authors Ainun Jariah Nurul Haslindah