• Title/Summary/Keyword: Industrial Shipbuilding Complex

Search Result 15, Processing Time 0.025 seconds

An Analysis of Multidimensional Productivity for the Shipbuilding Performance (조선 성과 측정을 위한 다차원 생산성의 분석)

  • Kim, Yearnmin
    • Korean Management Science Review
    • /
    • v.34 no.2
    • /
    • pp.57-66
    • /
    • 2017
  • The purpose of this study is to analyze the multidimensional productivity of the shipbuilding performance and to explain the role of different factors, such as man-hour, dock period, number of building block, launching process rate, automatic welding percent, and drawing fault rate which are important production-related variables in most shipbuilding companies. The shipbuilding productivity is obtained using Data Envelopment Analysis (DEA) approach. Then, a Tobit model is considered to measure the influence of different factors on the measured productivity. The results reveal that this productivity measure can substitute a representative shipbuilding productivity index (CGT/man-hour) in shipbuilding industries. Also, this multidimensional productivity analysis using DEA and Tobit reveals complex relationships between production-related variables and CGT and sale.

Concentration Distribution of Volatile Organic Compounds in the Ambient Air of an Industrial Shipbuilding Complex : A Case Study (조선소 밀집지역의 휘발성유기화합물 농도분포 특성에 관한 사례 연구)

  • Lee, Myoung-Eun;Park, Eun-Ok;Chung, Jae-Woo
    • Journal of Korean Society of Environmental Engineers
    • /
    • v.37 no.6
    • /
    • pp.380-386
    • /
    • 2015
  • In this study, the spatial and temporal distribution of volatile organic compounds (VOCs) in an industrial shipbuilding complex was monitored, and the local characteristics estimated. The major VOC component measured at all of the sampling sites were almost the same as those found at an indoor painting facility, indicating that painting works conducted in the shipyards were a significant source of VOCs in the vicinity of shipbuilding areas. The main parameters affecting the VOCs distribution were the distance between the sampling site and painting work place, and the intensity of the painting works. A quite broad range of VOC concentrations were observed in all of the sampling sites, depending on the intensity of painting works in nearby areas suppressing the typical seasonal and temporal variation trends in VOCs observed in urban areas.

Simulation Based Production Using 3-D CAD in Shipbuilding

  • Okumoto, Yasuhisa;Hiyoku, Kentaro;Uesugi, Noritaka
    • International Journal of CAD/CAM
    • /
    • v.6 no.1
    • /
    • pp.3-8
    • /
    • 2006
  • The application of three-dimensional (3-D) CAD has been popularized for design and production and digital manufacturing has been spreading in many industrial fields. By simulation of the production process using 3-D digital models, which are the core of CIM (Computer Integrated Manufacturing) system, the efficiency and safety of production are improved at each stage of work, and optimization of manufacturing can be achieved. This paper firstly describes the concept of "simulation based production" in shipbuilding and also digital manufacturing; the 3-D CAD system is indispensable for effective simulation because ship structure is three dimensionally complex. By simulation, "computer optimized manufacturing" can be possible. The most effective fields of simulation in shipbuilding are in jobs where many parties have to cooperate, while existing two-dimensional drawings are hardly observed the whole structures due to interference between structures or equipment of complex shape. In this paper some examples of the successful application in IHIMU (IHI Marine United Inc.) are shown: assembly of a pipe unit, erection of a complex hull block, carriage of equipment, installation of a propeller, and access in an engine room.

Research Trends of Scheduling Techniques for Domestic Major Industries (국내 주요 산업별 스케줄링 기법의 연구동향)

  • Lee, Jae-yong;Shin, Moonsoo
    • Journal of Korean Society of Industrial and Systems Engineering
    • /
    • v.41 no.1
    • /
    • pp.59-69
    • /
    • 2018
  • The up-to-date business environment for Korean manufacturers is very complex and rapidly changing. Especially, the companies have faced with various changes derived from small quantity batch production, diversification of customer demands, and short life cycles of products. Consequently, the Korean manufacturing companies are in need of more efficient production planning and scheduling techniques. In this paper, the research trend of scheduling techniques is investigated to provide relevant information to researchers in this field. Furthermore, some implications for future researches are presented regarding literatures published in Korea over the last 10 years. This paper presents an entire investigation into Korean research works on scheduling (2,569 papers) that are published from 2007 to 2016. Especially, detailed analysis was carried out in the following three industry : 1) semiconductor, 2) shipbuilding and 3) automobile. In this paper, approaches to scheduling presented in the literature are categorized into the following three categories : 1) application, 2) algorithm, and 3) simulation modeling. First, in the semiconductor industry, scheduling techniques related to semiconductor cleaning processes, photolithography processes, chemical processes, transport and transport equipment have been found to be dominant. Second, the shipbuilding industry is focused on assembly processes, transporter, crane and various existing production management system. On the other hand, the scheduling research of the automobile industry is mainly focused on the vehicle movement routing and procurement supply-chain planning algorithm in terms of logistics. The conclusion of this study are expected to provide many implications for various types of academic and practical follow-up studies related to scheduling in consideration of main characteristics of semiconductor, shipbuilding and automobile industries.

The Application of Systemic Analysis on Complex and Multi-layered Shipbuilding yard in Korea (다계층·복합구조의 국내 조선소를 대상으로 한 시스템분석기법 적용 방안 연구)

  • Bae, Gye wan;Kim, Kyunghwan
    • Journal of the Korean Society of Safety
    • /
    • v.36 no.4
    • /
    • pp.88-98
    • /
    • 2021
  • Korean industry has achieved dramatic growth in a short time through continuous technical innovations. However, safety consciousness and management have not kept pace with industry growth. The characteristics of industrial accidents in socio-technical systems have become so complicated that it has been challenging for safety professionals to implement effective preventive measures because it is difficult to determine what is happening in the complex workplace. Thus far, they have focused on technical improvements and the requirements of OSH regulations to avoid legal responsibility. Accordingly, this study has used the systemic analysis method to explain the emergence of something unexpected in complex and multi-layered business structures, which is usually related to the variabilities of humans and organizations. This study chose a shipyard where a few fatal accidents had occurred because the shipbuilding industry includes numerous variabilities, including obtaining orders, manpower supply, procurement, etc. Systemic analysis progressed using FRAM based on two accident cases related to the truss platform used in LNG vessels. The outcome shows that each function within the system has its variabilities and has become coupled or dependent on other functions, increasing the possibility of accidents. This analysis method can provide OSH professionals with practical techniques for explaining what is happening in a complex socio-technical system and how to take proper measures.

Improvement of VSDS (Ventilation System Design Software) (산업환기시스템 설계 소프트웨어의 개선)

  • Park, Dong-Hee;Kim, Tae-Hyeung
    • Journal of Korean Society of Occupational and Environmental Hygiene
    • /
    • v.10 no.2
    • /
    • pp.78-97
    • /
    • 2000
  • Designing the industrial ventilation system is the complex and time-consuming job. It could generate some errors in the design calculations if one uses the hand-calculator or the spreadsheet program. To overcome these difficulties, VSDS(Ventilation System Design Software) had been developed a few years ago. But, it had the difficulty in designing a complex system having many branches because the user can not see the layout of the system on the screen. Another difficulty is that VSDS had been based on the assumption of the standard air condition. VSDS has thus been improved to overcome the shortcomings of the old version of VSDS.

  • PDF

A Study on the Working Clothes in the Changwon National Industrial Complex -Considering Clothing Performance and Motion Factors in Work Places- (창원국가산업공단 근로자들 작업복 착용실태에 관한 연구 -작업분야별 작업복 기능성 및 동작요인 중심으로-)

  • Park, Gin-Ah;Bae, Hyun-Sook
    • Journal of the Korean Society of Clothing and Textiles
    • /
    • v.32 no.10
    • /
    • pp.1571-1583
    • /
    • 2008
  • The study aimed to investigate the actual condition of working clothes in the Changwon National Industrial Complex and to analyze the industrial workers' satisfaction with and preference to the working clothes in terms of the clothing performance and work motion factors. 1 major companies in machinery, automotive, industrial engineering, shipbuilding and rolling stock industries located in the industrial complex were selected as the subject firms. Approximately 900 workers responded to the questionnaire designed for the research and the results derived from the research were as follows. (1) The subject employees were divided into 4 work groups, i.e. the $1^{st}$ work group: managerial, general affairs, sales, production planning; the $2^{nd}$ group: quality assurance, material planning and distribution, product inspection; the $3^{rd}$ group: electric, facilities, machinery, vehicles; and the $4^{th}$ group: cutting, pressing, rolling, welding and coating. (2) The significant work environmental factors considered by all work groups were air ventilation, noise and dust factors and in particular, the most dissatisfied factors evaluated by manufacture workers were insulation, noise, dust and vibration. (3) According to the employees' work motion evaluation, the work motion diversity and frequency increased in proportion to the degree of work intensity. Besides, manufacture workers more frequently wore the working clothes even during the off-duty hours comparing to the evaluation of the other work groups. (4) The most important clothing performance factors considered by manufacture work groups were perspiration absorption, stretch, air permeability, tactile sense softness, soil proof in order.

The Distribution Condition and Clothing Construction Factors of the Working Clothes - Reference to the Changwon National Industrial Complex -

  • Park, Gin-Ah;Park, Hye-Won
    • Journal of Fashion Business
    • /
    • v.12 no.3
    • /
    • pp.116-135
    • /
    • 2008
  • To investigate the actual distribution condition and clothing construction factors of the working clothes supplied to the Changwon national industrial complex, 5 major companies in machinery, automotive, industrial engineering, shipbuilding and rolling stock in the industrial complex located in Gyeongsangnam-Do were selected. The questionnaire designed for the research consisted of working clothes distribution policies in manufacturing industry and the actual conditions of the design facts, repair and maintenance of the working clothes, etc. The analysis of the clothing construction factors of the working clothes provided by 5 respondent companies were conducted in parallel. The results derived from the study were as follows: The basic types of working clothes were the blouson jacket and straight pants; safety equipments for manufacture were safety helmets, gloves, snickers, goggles, masks, ear caps, wristlets, leggings, apron, etc. The size-charts adopted by the participant companies were the small-medium-large and cm/inch measurement size systems. To solve wearer's dissatisfaction with the garment fit, certain clothing construction factors were used, e.g. strap bands and the elastic band on a waist band. The types of fabrics used for the working clothes were mainly polyester/cotton and polyester/rayon blended ones. Moreover, to provide with more air permeability to wearers, the warp knit material was used to construct the lining and the armpit or back bodice slits. Lock, two-thread chain, safety, overedge stitches were applied with flat, lap felled, French, superimposed, lapped, bound and edge finishing seams to construct the working clothes selected.

A Study on the Greenhouse Gas (CO2) Emission Reduction through Constructing Inventories and Process Diagnostic Techniques in Chemical Industry (A case of Ulsan City, Korea) (화학산업의 인벤토리 구축 및 공정진단을 통한 온실가스 배출 저감에 관한 연구)

  • Ahn, Jun-Ki;Cho, Kyoung-O;Cho, Hyun-Rae;Lee, Man-Sig
    • Journal of the Korea Academia-Industrial cooperation Society
    • /
    • v.12 no.7
    • /
    • pp.3302-3309
    • /
    • 2011
  • This study showed the reduced greenhouse gas(GHG) emission through GHG inventory establishment and process diagnosis for a response to climatic change. Also, it presented a direction for company's response to climatic change. Ulsan from its industrial complex has many energy-intensive companies such as petrochemistry, automobile and shipbuilding, and as we judged that the systematic reduction of GHG emission would make a considerable reduction of GHG emission in national dimension we executed this study from 10 companies. It showed the high rate of direction GHG emissions by its process that 5 of 10 companies calculated GHG emission and built its inventory. Also, in order to reduce energy and GHG, it produced about 227,554 million won of its economic effect and 50,740 ton/yr of its sparing effect.

On the Standardization of FRP Ships for the Cooperative Production System (강화플라스틱선의 협동화 생산시스템 운용을 위한 표준화 연구)

  • Na, Seung-Soo;Kim, Young-Hun;Kim, Keun-Cheol
    • Journal of the Society of Naval Architects of Korea
    • /
    • v.42 no.3
    • /
    • pp.276-283
    • /
    • 2005
  • The cooperative production system was proposed as an efficient production system to reduce the ship construction cost and to enhance the competitiveness for small/medium sized shipbuilder in the previous paper. In viewpoint of cooperative production system, the specialization of the FRP ship sizes has already been accomplished to reduce the number of the hull molds by FRP shipbuilders of the Sapjin industrial complex located in Mokpo area in 2003. There also exist lots of effective methods, as a cooperative production system, to cut down the construction cost. In this study, an effective production system in connection with the super structure and outfitting members is proposed such as the standardization of those items and specialized company which intensively produces the super structure and outfitting members at the collectivization area for cooperative work.