• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2007년도 추계학술대회 논문집
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• pp.349-350
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• 2007

• Journal of Information Technology Applications and Management
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• 제27권1호
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• pp.1-13
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• 2020

This study aims to measure the efficiency and productivity change of 30 domestic construction companies from 2010 to 2018 using data envelopment analysis(DEA) and Malmquist productivity index (MI). In particular, we used the number of employees, capital stock, and non-current assets as input variables, and sales and net income as ouput variables for the analysis. The dataset used for the analysis of efficiency and productivity changes is the employee profile and financial statements for the companies from 2010 to 2018. We found that the MI of the 30 companies is greater than one since 2013. This is because many years of TEC (Technical Efficiency Change) is greater than 1, which means that the productivity index increases as the TEC increases. In addition, the MI value was less than 1, which lowered the productivity of construction firms in 2018. The results of the study may help decision makers to find effective future management plans by analyzing the internal and external factors.

• 한국항공운항학회지
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• 제15권4호
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• pp.131-141
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• 2007

This paper identifies the productivity in the Global Air Transport Industry for the period of 1995-2001 by testing the Total Factor Productivity with tonqvist method. Based on panel data from 20 major international airline corporations which formed global strategic alliances, we find alliances make a considerably significant contribution to productivity increases. We also find that total factor productivity rate changed surprisingly in Air Transport Industry between pre- and post-Asian financial crisis period.

• 무역학회지
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• 제46권3호
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• pp.25-44
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• 2021

This paper analyzes the impact of the recent change in global value chain on the productivity of manufacturing sectors and firms in Chungnam area using ADB MRIO. Forward participation significantly increases sector productivity in Chungnam area and backward participation affects the sector productivity after 2015. In the analysis for firm productivity in Chungnam area, GVC participation does not enhance the productivity of firms in Chungnam area. However, firms in the top 25% of productivity in 2007 improved their productivity with higher GVC participation and the productivity of firms in the top 25% of asset in 2007 was positively affected by forward pariticipation and negatively affected by backward participation. The productivity of firms that were in international market in 2007 was significantly worsened by GVC participation.

• 오토저널
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• 제14권6호
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• pp.113-126
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• 1992

Recently the multi-kind, small-amount manufacturing system has been replacing the mass manufacturing system, and domestic machining inustry also is eager to absorb the new technology because of its high productivity and cost reduction. The optimization of the cutting condition has been a vital problem in the machining industry, which would help increase the productivity and raise the international competitiveness. It is intended in this study to investigate the machining costs per unit time which is essential to the analysis of the optimal cutting condition, to computer the cutting speed that lead to the minimum machining costs and the maximum production to suggest the cutting speed range that enables efficient speed cutting, and to review the machining economy in relation to cutting depth and feed. Also considered are the optimal cutting speed and prodution rated in rrelation with feed. It is found that the minimum-cost cutting speed increases and the efficient cutting speed range is reduced as machining cost per unit time increases since the cutting speed for maximum production remains almost constant. The machining cost is also lowered and the production rate increases as the feed increases, and the feed should be selected to satisfy the required surface roughness. The machining cost and production rate are hardly affected by the cutting depth if the cutting speed stays below 100m/min, however, they are subject to change at larger cutting depth and the high-efficient speed range also is restricted. It can be established an adaptive optimal cutting conditions can be established in workshop by the auto-selection progam for optimal operation. It is expected that this method for choosing the optimal cutting conditions might contribute to the improvement of the productivity and reduced the cost. It is highly recommended to prepare the optimal cutting conditionthus obtained for future use in the programing of G-function of CNC machines. If proper programs that automatically select the optimal cutting conditions should be developed, it would be helpful to the works being done in the machine shops and would result in noticeable production raise and cost reduction.

• 무역학회지
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• 제42권2호
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• pp.1-27
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• 2017

본 연구의 목적은 국내 제조 산업의 R&D 투자가 산업의 제품경쟁력과 원가경쟁력의 증대를 통해 높여 수출에 미치는 영향을 살펴보는데 있다. 이를 위해 한국 제조업을 대상으로 20개 업종별로 2004년-2014년도의 자료를 이용해 실증분석 하였으며, 산업의 제품 경쟁력을 신제품 혁신역량과 품질경쟁력으로, 산업의 원가경쟁력을 노동생산성과 자본생산성으로 나누어 살펴보았다. 경로분석을 통해 검증한 분석결과는 다음과 같다. 첫째, 제조 산업의 R&D 투자가 증가 할수록 산업의 신제품 혁신역량, 품질경쟁력, 노동생산성, 자본생산성이 증가하였다. 둘째, R&D투자로 증대된 제조업의 품질경쟁력, 노동생산성, 자본생산성의 향상은 수출 증가에 긍정적인 영향을 미쳤다. 따라서 한국 제조 산업의 R&D 투자는 품질경쟁력과 원가경쟁력의 강화를 통해 산업의 수출 증대에 긍정적 효과를 미친다는 것을 확인하였다.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2007년도 춘계학술대회A
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• pp.1632-1636
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• 2007

Generally, fine high carbon steel wire is produced using a multi-pass drawing process with speeds over 1000 m/min. The productivity of the wire drawing mainly depends on achieving the highest drawing speed without breaking the wire. In the multi-pass drawing, as the final drawing speed increases, the temperature rises several hundred Celsius. High temperature of wire increases the brittleness and leads to breaks. The objective of this study is to design pass schedule and wire drawing machine for superhigh speed. In the drawing experiment, it was possible to increase the productivity through the increase in final speed from 1100 m/min to 2000 m/min.

• 융합정보논문지
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• 제12권5호
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• pp.278-289
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• 2022

본 연구는 미용종사자의 업무가치감이 직무만족을 매개로 서비스 생산성에 미치는 영향을 실증적으로 분석한 연구이다. 연구결과 서비스 생산성에 영향을 미치는 요인을 실시한 결과는 업무가치감이 높고, 직무만족이 높을수록 서비스생산성이 높아짐을 알 수 있다. 또한 가치충족인식, 내재적만족, 업무가치인식, 자기가치인식, 외재적 만족이 높을수록 서비스생산성이 높아짐을 알 수 있었다. 또한 미용종사자의 업무가치감이 직무만족을 매개로 서비스향상에 미치는 영향을 알아본 결과 |Z|=15.057로 Z값이 1.96보다 큰 값을 보여 sobel test에서도 직무만족의 매개효과는 유의한 것으로 나타났다. 본 연구 결과를 토대로 미용종사들이 스스로 자신의 업무가 의미있고, 가치 있으면 보람되다고 인지할 수 있도록 내적동기를 상승시키고 일 자체에서 오는 만족감, 내재적 직무만족을 향상시킴으로서 서비스 생산성을 극대화 시킬 수 있을 것으로 기대한다.

• 가정과삶의질연구
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• 제19권3호
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• pp.73-87
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• 2001

The purpose of this study is to confirm the productivity of housework empirically by analyzing the newspaper articles during the financial aid from the IMF. During this period, Korean Households expenses. And Korea government also wanted to share the burden of overcoming the currency crisis with households. Theoretically, Home economists has approved the productivity of housework as it increases the worth of wage by reducing cost of labor reproduction. So this article try to verify the productivity of housework by analyzing if there was public demand of housework as a means of reducing expenses during the IMF regime, based on newspaper articles. The major findings that are derived from the study are as follows : First, during the IMF regime, Households and housewives were described as an agent of overcoming economic crisis in newspaper articles. Second, households were required to substitute money expenses for housework to cut expenses. These results show that housework has worth as a productive labor and contribute to society and households as it increases the worth of wage and deceases the cost of living.

• 지식경영연구
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• 제19권2호
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• pp.1-19
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• 2018

This study aims to identify the causal relationship among public technology transfer, technological performance, and research and development (R&D) productivity. Using the impulse-response function(IRF) of a panel vector autoregressive model (panel VAR), this study suggests the results of how long the factors such as technological performance (patent), public technology transfer, and R&D productivity takes and lasts if a one-unit shock of standard deviation occurs. As a result, first, the increase of public technology transfer activities has no power to increase the technology performance but improve the R&D productivity. If the public institute increases its technology transfer activities by one unit, the R&D productivity will increase within five years. Second, the impact of increasing technological performance on improvement of public technology transfer and R&D productivity is an insignificant. Third, the effect of R&D productivity on the public technology transfer creates a substantial reaction after a current time. Considering the structural relationships among public technology transfer, technological performance, and R&D productivity, if policy makers intend to construct the active R&D circumstance, technology suppliers should be motivated to run the active R&D mechanism because they achieve gains.