• Proceedings of the Korean Institute Of Construction Engineering and Management
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• autumn
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• pp.295-300
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• 2001

Additional costs as well as schedule delay are occurred due to change orders in today's construction projects. Additional costs, overhead calculation methods are of various types. In a foreign country cases, many claims related to the loss of labor productivity quote research statistics data. In domestic cases, the study of the reason why the loss of labor productivity occurs and its effect have not been performed. Therefore, this paper analyzes factors affecting lost productivity and a methodology is presented to estimate the lost productivity.

• The Journal of the Convergence on Culture Technology
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• v.2 no.2
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• pp.51-63
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• 2016

The aim of this study was to investigate medical expenses and productivity lost costs associated with medical use of arthropathy disease. For this study, Using by Korea Medical pannel 5434 family and 15872 people in 2012, the enrolled 19-year-old arthropathy were considered and 1370 people were analyzed. Research Method was medical management calculation formular. Emergency medical using cost was 42,128,870 won per year, productivity lost costs was 98,640,000 won per year. Admission medical using times were 4.79, medical cost was 42,128,870 won, productivity lost cost was 945,036,820 won. Out patient clinic using time per year were 12.7, medical cost was 42,128,870 won, productivity lost cost was 91,252,728,000 won. According to this study, athropathy disease could affect to medical cost increasing and productivity decreasing, therefore I suggest that exercise and management for decreasing athropathy disease.

• Proceedings of the Safety Management and Science Conference
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• 2000.11a
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• pp.7-11
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• 2000

기업 생산 활동의 중요한 요소 4가지를 살펴본다면 사람, 기계, 원료, 방법이라고 이야기 한다. 기업에서는 생산성을 높이기 위하여 각종의 여러 기법등을 통하여 생산성 향상에 촛점을 두고 있다. 그러나 생산성 향상만큼 중요한 것은, 기업이 생산활동을 하는데 있어 기업의 손실을 최대한으로 감소시킬 수 있느냐에 따라서 기업의 성공여부가 결정될 수 있을 것이다. 기업에서 발생되는 손실부분중 커다란 부분을 차지하고 있는 것이, 산업재해로 인한 인적·물적인 손실이라고 할 수 있다. 현재 기업의 산업안전에 관한 실태를 살펴보면 인간중심의 안전관리보다는 기계중심의 안전관리가 더 우월하게 이루어지고 있다. 산업재해를 예방하기 위한 방법으로 기업 내에서 실시되는 산업 안전 교육이 기업 내에서 효율적으로 자리잡아 기업의 생산성 향상에 도움이 되고자 한다.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.28 no.3D
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• pp.363-369
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• 2008

Change is inevitable and is a reality of construction projects. Change adjustment includes the cost associated with materials, labor, etc. However, the actions of a contractor can cause a loss of productivity and furthermore can result in disruption of the whole project because of a cumulative or ripple effect. Because of its complicated nature, it becomes a complex issue to determine the cumulative impact (ripple effect) caused by single or multiple change orders. Furthermore, owners and contractors do not always agree on the adjusted contract price for the cumulative impact of the changes. What is needed is a reliable method to identify and quantify the loss of productivity caused by cumulative impact of change orders. This study survey the change orders data in domestic area for public construction and analyze to quantify change order impact. This study developed concepts of "%CO", "%Delta", "%T" to capture change order effect on project and search the relationships between them. Finally, this study find strong relationship between change order and loss.

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• autumn
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• pp.438-441
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• 2003

Construction delays are a common occurrence of most construction projects and difficult to analyze. there are some techniques to analyze delays, such as using CPM, Bar Chart but they are not enough to analyze concurrent and productivity lost delays. Productivity lost delays are different to interruption delays in computing the number of delays and analyzing concurrent delay. This paper describes the delay analysis method considering productivity including concurrent delay analysis.

• Journal of Korea Society of Industrial Information Systems
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• v.19 no.4
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• pp.65-72
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• 2014

To improve the productivity of manufacturing company, the analysis of loss in shop floor has to be conducted and validated. This paper introduces the downtime tracking module using the pre-developed shop floor information acquisition system. To collect the downtime, it utilized shop floor monitoring information, user-registered downtime event, equipment diagnosis algorithm and operator's input. Also, it provided the user interface for the analysis of downtime. From the results of a pilot study, the usability of developed system was validated.

• The Safety technology
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• no.27
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• pp.8-15
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• 2000

생산설비의 메인티넌스(Maintenance) 활동을 통해서 철저하게 손실과낭비를 배제하는 것으로서 생산성의 향상을 꾀하는 것을 목표로 한 TPM활동 즉, 전원참가의 생산성 보전활동이 제창되어지고 있는데 최근 어려운 경제환경의 저하로 많은 화학공장이 그것에 관심을 가지고 도입하고 있다. TPM의 기본적인 이념과 구체적인 추진방법에 대해서 설명한다. TPM활동에 의해 생산성 향상의 측면에서 커다란 성과를 올릴 수 있을 뿐만 아니라 설비면과 운전면에서의 안전관리에도 효과가 있다는 것을 알 수 있다.

• Feed Journal
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• v.2 no.6
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• pp.92-95
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• 2004

푸르른 실록의 5월이 지나 6월에 접어들면 우리나라의 경우 더위의 시작과 장마가 찾아오는 시기로 접어든다. 덥고 습윤한 환경은 우리 인간 뿐만 아니라 가축에게도 스트레스를 주고 생산성 저하를 유발시키고 경제적인 손실을 준다. 특히 착유우에 있어 덥고 다습한 환경은 체유지와 유생산을 위한 영양소의 섭취를 저해시키는 요인으로 작용하고 있다. (중략)

• Proceedings of the KAIS Fall Conference
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• 2002.05a
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• pp.212-214
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• 2002

본 논문에서는 기존 공정 Line중 TG Feed Back방식을 이용한 Control System은 매우 고가(高價)인 외산 TG임에도 불구하고 구동 Motor의 발열로 인하여 전압 검출부 Cabon Brush의 잦은 마모로 인한 오동작으로 작업의 문제점이 표출되어 생산성이 저하되고 품질 불만 및 불량품 발생으로 생산성에 큰 손실을 입고 있다. 이러한 문제점을 해결하기 위하여 본 연구에서는 새로운 Inverter Control System을 개발하였다. 여기에 따른 파급 효과는 제품의 생산성 향상과 소모성 부품의 수입 대처 및 부분적 제어시스템의 국산화 효과를 확보 할 수 있다.

• Environmental and Resource Economics Review
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• v.21 no.4
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• pp.947-980
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• 2012

This study analyzes the long-run impacts of climate change on Korean agriculture and economy. We estimate the impacts of climate change on the productivities of major agricultural products including rice, dairy and livestock using both a simulation approach and a semiparametric econometric model. The former predicts a decline in productivity while the latter predicts an increase in productivity due to climate change, especially for rice. A recursive dynamic CGE model is used to analyze the general equilibrium impacts of productivity change under the two different scenarios, derived from the two productivity analysis approaches. The loss of GDP in 2050 is 0.2% or 0.02% of total GDP depending on the scenario. It is shown that the losses in dairy and livestock sectors are larger than that in rice sector, although the losses in those two non-rice sectors have been ignored by most existing works.