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All Journal KAPAL Jurnal Ilmu Pengetahuan dan Teknologi Kelautan BERKALA SAINSTEK Agritrop : Jurnal Ilmu-Ilmu Pertanian (Journal of Agricultural Science) 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 Chemistry Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Transportation

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Risk Analysis of the Causes of Delay in Ship Construction (Case Study of KM CL 9E Ship Construction) Gazali, Goldy Sandy; Baroroh, Intan
BERKALA SAINSTEK Vol 10 No 4 (2022)
Publisher : Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/bst.v10i4.32674

Abstract

In shipbuilding work, the risk of delays must be analyzed and anticipated so that such delays do not occur and cause losses for both parties. This study aims to calculate the risk of a shipbuilding project using the Failure Mode and Effect Analysis (FMEA) method. The final result obtained is the result of the calculation of the Risk Priority Number (RPN) in determining what risks can af fect shipbuilding work. There are two jobs with RPN value > 200 which are classified as High Risk namely errors in lofting and damage to the pulley block as a supporting tool. The plans for risk management with the highest RPN value are then discussed with th e shipyard. Risk mitigation is carried out on the possible risk of errors in lofting, namely by adding worker personnel in the loft ing workshop who serve as supervisors and examiners. While the risk of breakage of the trough can be overcome by paying attention to the inventory and also the condition of the tool.
Comparative Analysis of CPM, PDM and PERT Methods in Ship Repair Scheduling Planning KN. RB 309 Ternate 01 Oktafiana, Laily Okta; Baroroh, Intan
BERKALA SAINSTEK Vol 10 No 3 (2022)
Publisher : Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/bst.v10i3.32479

Abstract

A ship that is still carrying out sailing activities must always be in a state that is in accordance with the classification and statutory. Maintenance or repair is needed for the ship in order to stay in good condition and fit to sail. In a ship repair project, there are several important aspects that need to be considered in order to complete project activities quickly and precisely. PT. XYZ has carried out ship repair activities, but the repair activities have been delayed due to weather factors, and the late procurement of spare parts. This research was conducted by analyzing the three models of scheduling fiberglass ship repair projects using Microsoft excel and using the CPM (Critical Path Method), PDM (Precedence Diagram Method) and PERT (Project Evaluation and Review Technique) methods. Results from the CPM method on 48-day A scheduling, 33-day B scheduling, and 21-day C scheduling. Pdm method results scheduling A 48 days, scheduling B 33 days, and scheduling C 21 days. In the PERT method the project can be completed in 48 days which is 48.67%, scheduling B 34 days 5 hours 21 minutes with the possibility of a KN ship repair project. RB 309 Ternate 01 can be completed in 48 days i.e. 99.35% and scheduling C 22 days 5 hours 21 minutes with the possibility of a KN ship repair project. RB 309 Ternate 01 can be completed in 48 days which is 99.99%.
Analysis Of Fbb Block (Fore Bulbous Bow) Scheduling Using The PDM Method Amrozi, Akhmad; Baroroh, Intan
Zona Laut : Jurnal Inovasi Sains Dan Teknologi Kelautan Volume 6, Number 2, July 2025 Edition
Publisher : Departemen Teknik Kelautan Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62012/zl.vi.44968

Abstract

Shipyards play a direct role in the development of maritime transportation in Indonesia. A shipyard is a special place equipped with facilities to support the process of building, repairing and maintaining ships. Scheduling is an important part of a new ship building project, apart from prioritizing a minimum budget and maximizing project quality. Careful project scheduling planning will support the achievement of production targets, both in quantity and quality. A shipyard in Surabaya must have its own innovation and advantages to face these challenges in order to compete with domestic and foreign shipbuilding companies. Therefore, work scheduling must be prepared using effective and efficient methods. In determining scheduling, there are several influencing factors, such as the number of workers, level of work difficulty, production facilities, and material availability. This research aims to optimize processing time planning for ship X's FBB block (rescheduling) based on various delay factors to obtain the fastest processing time for the production process. The results of accelerating critical activities using the PDM method with the alternative of additional labor are considered more efficient, where the actual duration can be accelerated by 35.6%.
The The effect of soaking coconut fiber in an alkaline solution on the tensile strength of composites Arisetya, Danny Arisetya Saputra; Widodo, Akhmad Basuki; Azhar, Ali; Baroroh, Intan; Kristiyono , Tri Agung
Zona Laut : Jurnal Inovasi Sains Dan Teknologi Kelautan Volume 6, Number 3, November 2025 Edition
Publisher : Departemen Teknik Kelautan Universitas Hasanuddin

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Abstract

Over time, the world's composite materials industry is increasingly developing. Generally, fiberglass-reinforced composite materials are developed. However, fiberglass fibers are expensive and not environtmentally friendly. The aim of this research was to determine the effect of composites reinforced with coconut fibers soaked in alkali. Specimen making using coconut fiber reinforcement that is pre-soaked using an alkaline chemical compound (Na) with a concentration of 5%. This study carried out tensile testing with variations of coconut fiber and soaked it in alkaline chemical compounds for 1-4 days. The measurement of the tensile strength value in the composite refers to the ASTM D638-02 standard and the tensile strength value will be analyzed using the ANOVA method to determine the significant effect on the soaking treatment of NaOH. The results of the tensile strength test in this study are far from the standard results that have been set by the Indonesian Classification Bureau (BKI) in 2021. So, coconut fiber with alkaline soaking for 1-4 days cannot be used as a substitute for fiberglass as a composite material reinforcement to be applied as the main material of the ship.
Analysis of Reduction Cost of Assembly Block Side Shell 1A (SS 1A) Using Critical Path Method (CPM) in Hospital Ship Project Suharyoko; Baroroh, Intan
Zona Laut : Jurnal Inovasi Sains Dan Teknologi Kelautan Volume 6, Number 3, November 2025 Edition
Publisher : Departemen Teknik Kelautan Universitas Hasanuddin

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Abstract

Abstract The hospital ship project is a major project that has a long period of time, with limited space allocation and human resources as well. In order to avoid problems for PT XXX related to project completion, namely experiencing delays, where many factors affect the course of the project, an improvement analysis is needed for optimization. Optimization is done by scheduling a new project with the hope that in the next similar project PT XXX will not experience similar problems. Using Critical Path Method (CPM) analysis, the assembly process of Block Side Sheel 1A (SS 1A) on the Hospital Ship Project has a work network analysis with acceleration on activities E-F-G-J-K-L-M-N-S, through analysis steps using overtime. Thus it takes an acceleration cost of Rp. 6,943,510, or an additional cost of 32.26% of the initial cost to minimize the time from 64 days to 37 days, so that there is no delay in future hospital projects.
Implementation of Material Control in Tugboat Ship Building Using the Lot For Lot (LFL) Method Case Study : (PT.PMP) Baroroh, Intan Intan; Tarigan, Eko Febrianto; Sumantri, Siswo Hadi; Azhar, Ali; Hardianto, Dididk; Kristiyono, Tri Agung
International Journal of Marine Engineering Innovation and Research Vol 9, No 3 (2024)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v9i3.20859

Abstract

Material procurement in the shipping industry accounts for 2/3 of the total production cost.  PT.PMP is a company that focuses on the shipbuilding industry including Ship Design, Ship Building and Ship Repair. In the implementation of material procurement, there are often delays in the delivery of materials from suppliers resulting in delayed production time. Material inventory in the warehouse is sometimes insufficient to meet production needs. In the Pre-Order system, the company must ensure the availability of prepared planning items, but the Company sometimes faces a shortage of raw materials which results in delays in the delivery of promised goods. Material Requirement Planning (MRP) is a method used to organize and plan material orders. The purpose of this study is to determine the material planning strategy using the Lot for Lot method and the Economic Order Quantity method comparison between efficient methods at PT.PMP and to determine the efficiency results of the comparison between the Lot for Lot (LFL) method, Economic Order Quantity (EOQ) and the existing method at PT.PMP. The materials analyzed are Plate and Profile in the New Building Tugboat Project. The results obtained from the inventory cost research that the Lot for Lot method is 28%, the Economic Order Quantity method results in an inventory cost of 29% and the company method that is still being applied results in a high cost of 43%. The Lot for Lot method is more efficient by 15% than the existing method applied by the company.
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 Bagus Aditya Budiman, Karma Darmawan, Mochammad Rizky Didik Hardianto Ekowanti, Mas Roro Lilik Galuh Valent Setiawan Gazali, Goldy Sandy 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 Muhammad Heldyan Ilham Ndaru Gilang Ramadhan Oktafiana, Laily Okta Prabawathya Poundra, Gde Rendra Ardianto Suharyoko Sumantri, Siswo Hadi Tarigan, Eko Febrianto Tri Agung Kristiyono