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Journal : KAPAL Jurnal Ilmu Pengetahuan dan Teknologi Kelautan

Analysis Of Ship Main Engine Procurement Process In The Shipyard Industry Using Supply Chain Operation Reference Method (SCOR) (Case Study: PT XYZ) Ariany, Zulfaidah; Yusim, Adi Kurniawan; Utomo, Budi; Tampubolon, Mikhael Fernandus
Kapal: Jurnal Ilmu Pengetahuan dan Teknologi Kelautan Vol 21, No 1 (2024): February
Publisher : Department of Naval Architecture - Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/kapal.v21i1.60499

Abstract

As a sector playing a crucial role in ship construction and repair, the shipbuilding industry faces significant challenges in material procurement, where materials constitute 50-70% of the total project cost. One of the materials requiring paramount attention is the ship's main engine. Effective supply chain management is critical to enhancing efficiency and effectiveness in the procurement process of ship engines. However, supply chain performance measurement research, especially in ship engine procurement, still needs to be improved. Therefore, this study aims to identify relevant performance metrics, analyze critical performance indicators, and provide recommendations based on the SCOR (Supply et al.) framework to improve ship engine procurement. The research results present 24 metrics distributed into four performance attributes based on SCOR 12.0, with 22 selected metrics aligned with the company's context. Analysis using the AHP method indicates that the reliability attribute has the highest weight (0.296), with the metric "Percentage of procurement received on time as per request" being the top priority (weight 0.143). This study provides a holistic view of crucial aspects of the ship engine procurement supply chain, supporting companies in enhancing their performance in the procurement process.
Enhancing Propulsion Performance for Container Ships through Propeller Adjustments: A Case Study MV. Kendhaga Nusantara 6 Ariany, Zulfaidah; Santoso, Budi; Suharto, Suharto; Sarwoko, Sarwoko
Kapal: Jurnal Ilmu Pengetahuan dan Teknologi Kelautan Vol 20, No 3 (2023): October
Publisher : Department of Naval Architecture - Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/kapal.v20i3.58338

Abstract

The ship's service speed performance is prioritized in a ship's propulsion system planning. Motor Vessel. KENDHANGA NUSANTARA 6 is a type of containerized cargo ship built to support the sea toll program in the Tanjung Emas port area, Semarang. The less significant propeller pitch affects the ship's ability to move. The experiment was carried out by operating the machine with maximum capability. The phenomenon of the geometric shape of the propeller provides information on the rotation results and the distribution of the working forces. The structure of the propeller design describes the ability and level of effectiveness when the propeller is submerged in water. The results of this study show that the optimization value of the right propeller pitch is 0.6%, the pitch width is 1660 mm, and the optimization value of the left propeller pitch is 1.2% with a pitch width of 1670 mm; this value can make the ship's rate speed during the docking trial 12.3 knots, following the planned speed.
Assessment of the Stability and Response of a Catamaran-Hull Ferry to Operational and Environmental Conditions Santoso, Budhi; Romadhoni, Romadhoni; Ariany, Zulfaidah; Ridwan, Muhammad
Kapal: Jurnal Ilmu Pengetahuan dan Teknologi Kelautan Vol 21, No 3 (2024): October
Publisher : Department of Naval Architecture - Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/kapal.v21i3.64789

Abstract

Ship stability is a critical factor in the operation of a catamaran, especially when facing various sea conditions. The catamaran H-192, recently acquired by PT XY, is used as a case study in this research to assess its stability and response to operational and environmental conditions. Stability criteria based on Annex 7 of the High-Speed Craft (HSC) Code are used as the evaluation standard. This research aims to evaluate the stability and response of the catamaran H-192 under various operational and environmental conditions. The primary focus is to ensure that the vessel meets and exceeds the stability criteria set by Annex 7 and to understand how the vessel behaves in real-world situations. The methods used in this research include stability calculations based on Annex 7 and model design using Maxsurf software. The calculations involve the analysis of the righting lever (GZ), metacentric height (GM), and other stability criteria. Operational data and load distribution are analyzed to determine the draft, trim, and stability of the vessel under various loading conditions. The results show that the catamaran H-192 not only meets but also exceeds the stability criteria set by Annex 7. The high values of righting lever (GZ) and metacentric height (GM) at various angles of heel indicate excellent transverse and longitudinal stability. The evaluation of intact stability criteria shows that all parameters achieve "PASS" status, indicating the vessel's capability to handle combinations of heeling forces due to wind, high-speed maneuvering, and passenger crowding very well. The analysis of both full and empty operational conditions shows balanced load distribution and maintained stability.