• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2014년도 춘계 학술논문 발표대회
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• pp.42-43
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• 2014

Few studies on crew productivity has been conducted, although the data is significant for time and cost estimation. Crew productivity data was collected for over 9 months from a nuclear power plant and analysed in order to identify factors driving the productivity. It was revealed that the crew productivity of form work, rebar work and concrete pouring work was 45.64(㎡/crew·day), 2.93(t/crew·day), 110.25(㎡/crew·day) on average respectively. Moreover, 'nightwork', 'No. of workers per crew' and 'total work amount' were identified as drivers.

• 국제학술발표논문집
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• The 5th International Conference on Construction Engineering and Project Management
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• pp.359-366
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• 2013

Although many research efforts have been conducted to address the effect of crew members' work skills (e.g., technical and planning skills) on work performance (e.g., work duration and quality) in construction projects, the relationship between skill and performance has generated a great deal of controversy in the field of management (Inkpen and Crossan 1995). This controversy can lead to under- or over-estimations of the overall project schedule, and can make it difficult for project managers to implement appropriate managerial policies for enhancing project performance. To address this issue, the following aspects need to be considered: (a) work performances are determined not only by individual-level work skill but also by the group-level work skill affected by work team members, each member's role, and any working behavior pattern; (b) work planning has significant effects on to what extent work skill enhances performance; and (c) different types of activities in construction require different types of work, skill, and team composition. This research, therefore, develops a system dynamics (SD) model to analyze the effects of both individual-and group-level (i.e., multi-level) skill on performances by utilizing the advantages of SD in capturing a feedback process and state changes, especially in human factors (e.g., attitude, ability, and behavior). The model incorporates: (a) a multi-level skill evolution and relevant behavior development mechanism within a work group; (b) the interaction among work planning, a crew's skill-learning, skill manifestation, and performances; and (c) the different work characteristics of each activity. This model can be utilized to implement appropriate work planning (e.g., work scope and work schedule) and crew management policies (e.g., work team composition and decision of each worker's role) with an awareness of crew's skill and work performance. Understanding the different characteristics of each activity can also support project managers in applying strategic work planning and crew management for a corresponding activity, which may enhance each activity's performance, as well as the overall project performance.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2012년도 추계 학술논문 발표대회
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• pp.285-286
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• 2012

In the large scale projects, it is difficult to manage every blocks because of the apartment housing project have repetitive shapes and structures. Therefore, it is necessary to divide construction site into work zones and blocks considering site plan, the number of units per each floor, arrangement of blocks, etc. In this study, 20 influencing factors on the grouping of work zones and formwork crew team formation are identified through case study and literature review. Factors are analyzed to determine the degree of influence through experts interviews. A systematic process of crew formation based on work zoning and the considerations by each steps are presented.

• 한국항공운항학회지
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• 제30권3호
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• pp.76-85
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• 2022

Work situational awareness test (WSAT) has been utilized to estimate the fatigue risk of workers who worked with time pressure or latent accident risks at their work environment. Thus researchers decided to use WSAT to estimate fatigue risk of cabin crews of an airline in Korea and to analyze empirically how such risk might have an effect on cabin crew's safety behavior. This was because there had not been enough research on accessing cabin crews' fatigue and analyzing its risk for the flight safety. In addition, the mediation effect of cabin crew's planning was also analyzed through Sobel-test by researchers among external factors such as lack of concentration, attention deficit, distraction and safety behavior. According to empirical analysis, it was found attention deficit and distraction of cabin crews due to fatigue during the flight had a significant negative effect on their planning. Planning was also proven to have mediation effect to cabin crew's safety behavior.

• 항공우주정책ㆍ법학회지
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• 제34권1호
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• pp.39-77
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• 2019

국제항공운송에 종사하는 승무원은 업무의 성격상 여러 나라에서 근로를 제공하게 된다. 국제사법에 의하면 일상적 노무제공지는 국제근로계약의 준거법 결정(제28조 제2항), 국제재판관할의 결정(제28조 제3항, 제4항)에서 중요한 역할을 수행한다. 일상적 노무제공지는 국제재판관할과 준거법의 결정을 위하여 EU에서 제창된 개념으로, 국제항공법에서 항공안전을 확보할 목적으로 승무원의 피로관리를 위해 도입된 개념인 모기지(母基地)와 입법목적이 서로 달라, 일상적 노무제공지와 모기지는 같은 개념이라고 볼 수 없다. 승무원의 일상적 노무제공지를 결정하기 위해서는 (i) 승무원이 근무를 시작하고 종료하는 곳, (ii) 승무원이 업무를 수행하는 항공기가 주로 주기(駐機)된 곳, (iii) 사용자가 전달한 지시사항을 알게 되고 근무활동을 조직하는 곳, (iv) 근로계약상 승무원이 거주할 의무가 있는 곳, (v) 사용자가 제공하고 승무원이 사용할 수 있는 사무실이 있는 곳, (vi) 승무원이 업무에 부적합하거나 징계사유가 발생할 때 참석할 의무가 있는 곳 등을 종합적으로 고려하여야 한다. 그런데 위에서 열거한 사항은 모두 모기지 소재지와 동일하므로, 승무원의 일상적 노무제공지를 결정할 때 모기지를 가장 중요한 요소로 고려하는 것이 타당하다. 이와 달리 기적국을 일상적 노무제공지로 보아서는 안 된다. 대상사안에서 CJEU는 국제항공운송에 종사하는 객실승무원의 일상적 노무제공지에 관하여 최초로 판단기준을 제시하였는바, 이는 우리나라 국제사법의 모범이 되었던 브뤼셀 규정의 해석이므로, 국제항공운송 승무원에 관하여 국제사법상 일상적 노무제공지의 개념을 이해하는데 많은 도움이 될 것으로 보인다.

• 대한인간공학회지
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• 제36권5호
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• pp.579-587
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• 2017

Objective: The purpose of this study is to measure the workload of Korea coastal ship crew members, to investigate whether they are following work-break time regulations and to identify the main causes of their workload. Background: According to the US Coast Guard, about 33% of human casualties are reported to be due to fatigue, and 30% of marine casualties reported by the British Marine Accident Investigation Agency (MAIB) are attributed to crew fatigue. But the coastal ship are not managed for business hours and breaks despite the harsh environment. Method: The workload of duty crew members on the 100 domestic coastal vessels was measured. It was also investigated whether they are following domestic and international work-break time regulations. Finally, the marine accidents resulted from the fatigue of the crew was analyzed. Results: As a result of workload analysis, the workload on the 42~62% of the vessels exceeded the standard of working time on the related regulation. The workload increased with the number of inbound and outbound ports. Especially, in the system where there are two seafarers, the workload exceeded the working time requirement. As a result of the marine accidents analysis on 100 vessels, it was found that collision and grounding occurred due to fatigue, workload and drowsiness in 7 marine accidents out of 30 marine accidents. Conclusion: It is necessary for the shipping companies to introduce an operation management manual for the management of the crews' workload and reasonable crew arrangement. It is also required for crew members to easily record work times and for shipping companies to manage the record. It would be possible to prevent many marine accidents by providing adequate rest to the crews and flexibly adjusting their working hours. Application: The results of this study can be used as fundamental data to manage crews' fatigue and to make job management manuals.

• 수산해양교육연구
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• 제29권3호
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• pp.811-821
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• 2017

This paper intends to propose the direction for improving the welfare space in crew accommodation of fishing vessels engaged in coastal and inshore fishery business in order to solve the phenomenon which young fishers trend to avoid working on fishing vessels. Coastal and inshore fisheries are defined as permitted fisheries business under the Fisheries Act and classified into coastal fisheries and inshore fisheries based on a gross tonnage of 10 tons. Fisheries Act also stipulates the upper limit tonnage regulation and the restrictions on bottoms of fishing vessels permitted for coastal and inshore fisheries to protect fishery resources and to prevent overfishing. It is difficult to increase the welfare space in crew accommodation of fishers under such restrictions because the welfare space in crew accommodation could be secured by reducing the space for the strength of fishing. Therefore, this paper compares the revision trend of the international convention(The Work in Fishing Convention, 2007) and domestic laws on welfare space in crew accommodation of fishing vessels engaged in coastal and inshore fishery business to find out the problems and improvement points in securing the welfare space in crew accommodation of fishing vessels. As a result, it is proposed to revise the Enforcement Ordinance of the Fisheries Act so as to secure the welfare space in crew accommodation of coastal and inshore fishing vessels within the scope of maintaining the maximum allowable tonnage limit regulation by adding an exemption provisions of the restrictions on bottoms of fishing vessels in which case the gross tonnage is increased for securing the spaces for crew accommodation and sanitary facilities of fishers without increasing net tonnage where the bottoms of fishing vessels is increased by renovating or replacing the fishing vessels bigger than the bottoms of fishing vessels permitted within the scope of maintaining the maximum allowable tonnage limit regulation.

• 한국산학기술학회논문지
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• 제20권9호
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• pp.133-141
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• 2019

철도 승무원 교번표 작성은 보통 한 달을 주기로 승무원에게 기 작성된 승무다이아를 근무 기준에 맞게 배치하는 작업으로 균등한 사업 시간을 갖도록 작성해야 한다. 본 연구는 기존 철도 운영시에 승무 교번작성과 관련된 문제점을 파악하고, 승무 운영의 합리적 계획 시에 적용할 수 있는 최적화된 승무 교번표 작성 방안을 제시하고 있다. 이를 위해 실제 철도운영기관의 근무 기준을 파악하였으며, 실제 근무패턴을 고려한 교번표 작성 및 유전알고리즘을 통한 최적화 과정을 통해 균등한 사업 시간을 갖는 교번표를 도출하고자 하였다. 교번표 최적화 과정은 입력데이터 분석, 근무패턴생성, 해생성, 최적화 단계로 구성하였으며, 최적화 단계에서는 유전알고리즘을 적용하여 교번표를 도출하는 방안을 제시하였다. 또한 연구에서 제시한 과정을 통해 도출한 교번표와 수작업으로 작성된 교번표의 차이를 비교하여 연구에서 제시한 방안을 검증하고 있다. 연구에서 제시한 승무교번 배치 방안은 사업시간의 표준편차 최소화를 목적함수로 하였으므로 교번 작성시 사업시간 편차를 감소시키는 방법론으로 활용성이 기대된다.

• 수산해양교육연구
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• 제28권6호
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• pp.1651-1661
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• 2016

The purpose of this study is to draw up a plan for improving working conditions of distant water fishing vessel crew in order to revitalize the declining distant water fishing industry. Land-based employment has increased as the result of industrialization, which in turn created shortage in marine crew supply for distant water fishing vessels. Pressure on increasing wages for sea farers is put on the industry for this reason, making the labour market in the distant water fishing industry tougher and tighter. Multiple issues have yet to be addressed for distant water fishing vessel crew. They suffer from excessive work compared to other industries. Crew management is another issue, as sea farers face poor labour conditions, working on board vessels in a collective way where no autonomous actions are allowed. Other issues include unqualified crew supply, increasing ratio of labour costs for crew to sales, and intensified implications of labour unions, which are as well making crew supply difficult as a whole. To this end, more well-qualified workers should take part in production operations in the distant water fishery. Both wage increase and working condition improvement should be achieved in order to strengthen motivation towards qualified sea farers. Sustainable crew supply can be achieved when working environments, gender-based working conditions, welfare are prioritized and improved as a whole.

• 한국건축시공학회지
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• 제10권3호
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• pp.121-128
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• 2010

본 연구에서는 건설공사의 합리적인 공사비 산정을 위하여 기존 표준품셈의 문제점을 개선하고, 새로운 적산 모델을 도입한 작업조 기반 표준품셈을 제안하고자 한다. 그리고 공동주택 시멘트 액체방수 공사를 대상으로 건설공사의 적산기술과 시공능력을 향상할 수 있도록 작업조구성과 시공프로세스를 체계화하였다. 또한 공동주택에서 욕실부분 시멘트 액체방수 공사를 대상으로 전용면적 $84{\sim}85m^2$, 전용면적 $125{\sim}184m^2$의 노무량 및 생산성을 분석하고 현행 표준품셈과 작업조 기반 품셈의 특징을 비교 분석하였다. 본 연구를 통하여 공동주택 시멘트 액체방수 공사의 현행 표준품셈과 작업조 기반 품셈을 서로 비교하였을 때, 전용면적 $84{\sim}85m^2$에서는 방수공은 평균 1.91~2.13배, 보통인부는 평균 8.82~9.52배의 차이가 있었다. 그리고 전용면적 $125{\sim}184m^2$에서는 방수공은 평균 1.89~2.07배, 보통인부는 평균 8.57~9.38배의 차이가 나타났다.