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All Journal KAPAL Jurnal Ilmu Pengetahuan dan Teknologi Kelautan IPTEK The Journal of Engineering BERKALA SAINSTEK Agritrop : Jurnal Ilmu-Ilmu Pertanian (Journal of Agricultural Science) J-Dinamika: Jurnal Pengabdian Kepada Masyarakat Ge-STRAM: Jurnal Perencanaan dan Rekayasa Sipil International Journal of Marine Engineering Innovation and Research Zona Laut : Jurnal Inovasi Sains dan Teknologi Kelautan Jurnal Jalasena
Intan Baroroh
Universitas Hang Tuah
Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Transportation

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Hospital Auxiliary Vessel Fore Part Zone Planning to Improve Productivity with Precedence Diagram Method Wenny Prawati; Intan Baroroh
International Journal of Marine Engineering Innovation and Research Vol. 10 No. 2 (2025)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v10i2.6454

Abstract

The rapid development of Construction Management in Indonesia demands an efficient scheduling system to overcome project complexity. This study focuses on the process of building a hospital ship at one of the large shipyards in East Java, especially in the Fore Part Zone which has a high level of complexity and a limited number of blocks. Delays in this project are caused by several technical constraints such as machine breakdowns and drawing delays. This research aims to improve productivity by using the Precedence Diagram Method (PDM), which enables more optimal work scheduling by overcoming overlapping activities. Three scheduling scenarios were compared: Existing, Plan A, and Plan B. Plan A involved crashing techniques with the addition of overtime hours to accelerate critical Assembly activities (A13 and A14), resulting in a project duration of 301 days and productivity of 74.80 JO/day. Plan B integrated the drawing availability milestone as a prerequisite for the start of fabrication, and applied the same crashing as Plan A. As a result, Plan B was able to complete the project in 284 days with the same productivity, but with a more realistic and adaptive scheduling approach to field conditions. Based on critical path analysis and time efficiency, Plan B is the most optimal schedule for the construction of Fore Part Zone. This research is expected to be a reference in planning and controlling complex ship construction projects.
Risk Evaluation Of The Shipyard Supply Chain Process On Ship Repair With The House Of Risk Matrix Method Firmansyah, Hanif Ardhio; Baroroh, Intan; Azhar, Ali
IPTEK The Journal of Engineering Vol. 11 No. 2 (2025)
Publisher : Pusat Publikasi Ilmiah, Institut Teknologi Sepuluh Nopember.

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Abstract

One of the keys to the success of ship repair is the supply chain (SC) process of materials that arrive on time. However, delays in its implementation were still found due to poor SC risk management. The purpose of the study is to identify risk factors for SC delay, measure risk factors and evaluate risk factors. This study uses the HOR (House of Risk) method which identifies risk variables (risk events and risk agents) and designs mitigation actions. The results of the HOR phase 1 study show an assessment score in the form of Aggregate Risk potential (ARP) which has a high influence on KM repair. Lintas Damai 1 includes: Supplier's unpreparedness in fulfilling orders with a score of 225, the forwarder experienced a delay in scoring 116 and Needs rejuvenation of facilities and transportation with a score of 120 and KM. Shinpo19 includes the quality of materials from suppliers that are of poor quality with a score of 280, materials that are difficult to obtain in the area with a score of 138 and the layout of poorly organized storage warehouses with a score of 92. The results of HOR phase II include mitigation actions to handle risk agents in KM. Lintas Damai 1 includes finding trusted supplier partners, increasing networking with other suppliers, holding tenders with suppliers who are ready and conducting service and checks every month. Meanwhile, KM. Shinpo19 has mitigation actions to handle risk agents, namely replacing materials with the same specifications but still of quality, having supplier connections with quality standards, supervising suppliers so that they comply with quality standards and structuring materials based on their type.
in EVALUASI RISIKO KEHILANGAN ENERGI PADA BENGKEL FABRIKASI MENGGUNAKAN METODE BAYESIAN NETWORK Ridwan Efendy , Muhammad; Baroroh, Intan; Kristiyono, Tri Agung
Zona Laut : Jurnal Inovasi Sains Dan Teknologi Kelautan Volume 7, Number 1, March 2026 Edition
Publisher : Departemen Teknik Kelautan Universitas Hasanuddin

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Abstract

This study aims to analyze the risk of energy loss in ship fabrication processes at PT DUMAS Shipyard Surabaya using a Bayesian Network modeling approach. Energy losses were identified across six key processes: Sandblasting, Painting, Cutting, Forming, Welding, and Lifting Equipment (cranes, hoists, and forklifts). The Bayesian method was employed to model the probabilistic relationships among causal variables, including air pressure, cooling system performance, machine idle time, equipment condition, and operator behavior, all of which contribute to potential energy loss. Risk assessment was conducted by calculating likelihood and consequence values based on the AS/NZS 4360:2004 standard to determine the level of energy-related risk in each process. The results indicate that the Welding process has the highest probability of energy loss at 0.25 and is classified as a High Risk. Cutting, Sandblasting, and Painting fall under the Moderate Risk category, while Forming and Lifting Equipment are categorized as Low Risk. Recommended mitigation strategies include implementing automatic control systems for key equipment, enhancing operator training, and optimizing pneumatic and cooling systems. The energy risk evaluation serves as a basis for improving efficiency within the fabrication processes.
Implementation of Electronic E-Auction to Improve Shipyard Supply Chain Performance Baroroh, Intan; Trihastuti, Dian; Basuki, Minto; Suwasono, Bagiyo; Wasito, Tuesdaysaka Gustaf
International Journal of Marine Engineering Innovation and Research Vol. 10 No. 4 (2025)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v10i4

Abstract

Material procurement in the supply chain accounts for 60% of the ship contract value and has the highest burden with the largest portion of fund distribution, often resulting in procurement delays. This has an impact on delays in the delivery of modular ship construction. Supply chain performance delays are partly due to conventional auction methods, which result in many cases of fraud and a greater potential for material delays. The potential for losses results in delays in ship production, even though risk assessment activities have been carried out as an improvement for the shipyard. The purpose of web-based electronic auction research is to find efficient and accountable prices that can be justified. On the other hand, manual meetings are not necessary, as vendors can participate in meetings and the auction process from their respective locations, minimizing the potential risk of delays in the supply chain material procurement and enabling the production process to proceed according to the initial contract. The results of the research are in the form of an E-Auction user interface for auction processes with two functions, namely administrator login and login for partners or vendors implementing E-Auction auctions, thereby improving aspects of technology, management, marketing, and human resources.
Co-Authors Adam Erlanda Syarif Dzaky Adam Ahmad Basuki Widodo Akhmad Basuki Widodo Ali Azhar Ali Azhar Amrozi, Akhmad Aniek Sulestiani Arisetya, Danny Arisetya Saputra Bagiyo Suwasono Bagiyo Suwasono, Bagiyo Bagus Aditya Budiman, Karma Darmawan, Mochammad Rizky Dian Trihastuti Didik Hardianto Eko Febrianto Tarigan Ekowanti, Mas Roro Lilik Firmansyah, Hanif Ardhio Galuh Valent Setiawan Gazali, Goldy Sandy Gustaf Wasito, Tuesdaysaka Hardianto, Dididk Karma Budiman Kristiyono , Tri Agung Kristiyono, Tri Agung Kristiyono, Tri Agung Kusuma Aditya, Bagus Mariano Xavier Freitas, Fidel Laranjinha Mas Roro Lilik Ekowanti Minto Basuki Muhammad Heldyan Ilham Ndaru Gilang Ramadhan Ndaru Gilang Ramadhan Oktafiana, Laily Okta Prabawathya Poundra, Gde Rendra Ardianto Ridwan Efendy , Muhammad Siswo Hadi Sumantri Suharyoko Sumantri, Siswo Hadi Tarigan, Eko Febrianto Tri Agung Kristiyono Wasito, Tuesdaysaka Gustaf Wenny Prawati