• 한국해양공학회지
• /
• 제31권2호
• /
• pp.141-154
• /
• 2017

A production management system is developed to enhance both the information and productivity of ship and offshore plant deckhouse floor outfitting. The functions of the production management system for the deckhouse floor outfitting were reviewed based on a literature survey of several production management systems with respect to the ship building and architecture fields. This study investigated numerous daily production reports and their application to actual work places to utilize the system development. The developed scanned drawing-based production management (SDPM) system minimizes any loss and/or distortion of work information between the workshop and management office when applying a scanned production drawing to the daily report. The SDPM system increases the data objectivity, as well as intuitiveness of the information generation by adopting an efficient user interface, which makes it possible to perform image annotations on the scanned drawing for the daily production report while simultaneously interacting with the production management database. Applying the system operation to actual deckhouse floor covering work verified that it was feasible to use the SDPM system for production management in the ship outfitting work process.

• International Journal of Naval Architecture and Ocean Engineering
• /
• 제12권1호
• /
• pp.428-439
• /
• 2020

The continuous development of information and communication technologies has resulted in an exponential increase in data. Consequently, technologies related to data analysis are growing in importance. The shipbuilding industry has high production uncertainty and variability, which has created an urgent need for data analysis techniques, such as machine learning. In particular, the industry cannot effectively respond to changes in the production-related standard time information systems, such as the basic cycle time and lead time. Improvement measures are necessary to enable the industry to respond swiftly to changes in the production environment. In this study, the lead times for fabrication, assembly of ship block, spool fabrication and painting were predicted using machine learning technology to propose a new management method for the process lead time using a master data system for the time element in the production data. Data preprocessing was performed in various ways using R and Python, which are open source programming languages, and process variables were selected considering their relationships with the lead time through correlation analysis and analysis of variables. Various machine learning, deep learning, and ensemble learning algorithms were applied to create the lead time prediction models. In addition, the applicability of the proposed machine learning methodology to standard work hour prediction was verified by evaluating the prediction models using the evaluation criteria, such as the Mean Absolute Percentage Error (MAPE) and Root Mean Squared Logarithmic Error (RMSLE).

• 한국산업융합학회 논문집
• /
• 제22권3호
• /
• pp.353-364
• /
• 2019

The walk-way means a passage installed on the deck of a ship so that a person can safely move under any circumstances. So, the walk-way has to maintain a temperature of $5^{\circ}C$ or more for anti/de-icing even at an ambient temperature of $-62^{\circ}C$, a temperature in polar region. At present, the walk-way with heating cable is used, but the anti/de-icing effect is insufficient due to low heat transfer efficiency. Also, it has a construction problem due to heavy weight. In this study, an walk-way with a CNT surface heating element is proposed for the high anti/de-icing effect and the heating value per unit volume. The international standard survey, conceptual design, and simulation for the structural safety and the heat transfer are performed for the development of the proposed walk-way. To enhance the performance, the case studies based on the simulation analysis are conducted. Finally, the final prototype, applying the optimum material and thickness (3.2t of SS400) based on the case study results, is fabricated and experimented.

• 대한조선학회논문집
• /
• 제42권5호
• /
• pp.542-549
• /
• 2005

Naval ships are complex weapon systems which play the integrated performance by system integration of many kinds of weapon systems and their leading ships are usually not disposed after test and evaluation but militarised. Then, strict project management is required for naval ship building projects by identifying problems early and by taking prefer measures in time against unexpected situations encountered in the process of the projects. EVMS is a project management system which can manage the schedule and the budget of a project concurrently and estimate the project's time duration and the cost at project completion. In this paper, the applicability and usefulness of WMS is studied for a assumed navai ship building project, in the environment of monetary fluctuations such as price index, wage increase rate and exchange rate.

• 해양환경안전학회지
• /
• 제28권1호
• /
• pp.91-99
• /
• 2022

해운산업은 선박이라는 재화를 이용하여 화물을 운송하고 운임을 수취하여 사업을 영위하는 서비스산업이다. 따라서 선박운영을 위해 대규모 자본투자가 필요한 환경 속에서 선박의 가치가 불확실하다면 해운경영상의 리스크는 클 수 밖에 없다. 본 연구는 선박가치 변화에 영향을 미치는 변화요인을 파악하고 각 변화요인에 대한 중요도를 분석하고자 하였다. 이를 위해 텍스트마이닝과 토픽모델링 기법을 활용하여 선박가치 변화요인을 추출하고 구조화하여 3개의 주요인과 12개의 보조요인으로 계층적 구조를 설정하였다. 이를 대상으로 AHP분석을 통해 연구를 진행하여 각 요인별 상대적 중요도를 분석하였다. 분석 결과 선박가치 변화에 가장 큰 영향을 미치는 주요요인은 Shipping Factor였으며, 그 뒤를 Investment Factor와 Environment Factor가 차지하였다. 보조요인 가운데는 Volatility of Shipping Market와 Volatility of Shipping Freight 등 해운시장의 변동성과 관련된 요인들이 가장 큰 영향을 미치는 것으로 분석되었다.

• 한국안전학회지
• /
• 제26권2호
• /
• pp.70-76
• /
• 2011

Industrial accident frequency in small- and medium-sized ship-building plants is much higher than that of large-sized ones so that safety management activities should be different. In that sense, voluntary hazard assessment would be helpful for small- and medium-sized plants. However, conventional hazard assessment items and methods had some problems that discouraged voluntary participation of plants concerned. This study aimed to develop a new model for small- and medium-sized ship-building plants that can promote and encourage voluntary hazard assessment activities. For that purpose, ship-building process was assumed as a sequence of phases, and accident characteristics were compared with them. From that result, relative weights of accident factors including ship-building phases, accident types, occupational category, accident-induced objects, and hazardous items were determined with accident frequency data and with the help of expert groups. Therefore, for web-based integrative computer programming, a plain but accident data-dependent model was developed, with an additive function for related agencies that want to collect assessment results. It is expected that this model would help small- and medium-sized ship-building plants that wanted not only simple checklists but also effective assessment and management guidelines.

• 한국항해항만학회:학술대회논문집
• /
• 한국항해항만학회 2014년도 춘계학술대회
• /
• pp.144-145
• /
• 2014

IoT(Internet of Things)란 인터넷을 기반으로 모든 사물을 연결해 사람과 사물, 사물과 사물 간의 정보를 소통하는 지능형 기술 및 서비스를 말한다. 선박에는 다양한 기기가 서로 독립적으로 각자 역할을 수행하고 있으나, 이를 능동적으로 서로 연동하는 것은 실제적으로 쉽지가 않은 일이다. 이를 위한 수단으로 선박내의 통신, 선박간의 통신, 선박과 육상통신간의 구성을 SAN(Ship Area Network), RFID/USN, 광대역통신, 위성통신 등 다양한 IT 기술을 활용하여, 해양환경에서의 안전한 항행을 위한 선박의 안전관리시스템 구성 방안을 논하고자 한다. 본 논문에서는 선박의 다양한 안전관리시스템 분야 중에 선박내의 입 출입 인원관련 안전관리시스템 분야를 논의하고자 한다.

• 경영과학
• /
• 제23권2호
• /
• pp.175-185
• /
• 2006

How to efficiently manage assembly blocks at shipyard has been a hot management issue in the shipbuilding Industry, because it has significantly influenced on the productivity of shipbuilding process. This paper introduces the real practice of assembly block operations management in Hyundai Heavy Industries (HHI) and the Ship Assembly Block Operations Optimization (SABOO) project that h3s been launched in HHI as an academy-and-industry collaborative project, aimed to diagnose problems, propose possible solutions, and develop a prototype system in order to search ways of improving the assembly block operations management. Through the field interviews, observations, and benchmarking studies, the SABOO project diagnosed the most rudimental and urgent problem and proposed possible solutions. In addition, the SABOO project developed the prototype system that embodied the visual function of monitoring the shipyard on a real-time and the Interactive block assignment function that utilized the assembly block assignment algorithm developed by the project. As a whole, the SABOO project tested the possibility and gained an insight in extending the functions of block transportation/stockyard management system.

• 한국정보통신학회논문지
• /
• 제8권4호
• /
• pp.933-937
• /
• 2004

남해안의 여수 산단에 하루 100여척의 위험물 선박이 입$.$출항하면서 육지와 접안시 크고 작은 선박사고가 매년 발생하고 있으며 또한 발생할 우려가 다분히 존재하고 있음으로 항만 접안의 경우, 안전관리시스템에 대하여 전반적으로 연구하고자 한다.

• 한국정보통신학회:학술대회논문집
• /
• 한국해양정보통신학회 2004년도 춘계종합학술대회
• /
• pp.273-276
• /
• 2004

남해안의 여수 산단에 하루 100여척의 위험물 선박이 입ㆍ출항하면서 육지와 접안시 크고 작은 선박사고가 매년 발생하고 있으며 또한 발생할 우려가 다분히 존재하고 있음으로 항만 접안의 경우, 안전관리시스템에 대하여 전반적으로 연구하고자 한다.