• 아태비즈니스연구
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• 제11권2호
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• pp.189-206
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• 2020

Purpose - The purpose of this study is to clarify the mediating effect of profitability and activity in the relationship between productivity and stock return, assuming that the productivity of the company will affect share prices with the parameters of profitability and activity. Design/methodology/approach - The study extracted productivity indicators, profitability indicators, activity indicators, and share price-related indicators from 1999 to 2018 of non-financial enterprises listed on the securities market, and then classified them into three factors: productivity (labor productivity LP, capital productivity CP), activity (TT), and profitability (net profit rate NI, operating profit ratio OI) through the factor analysis method, and analyzed the impact of each factor on the stock return through steps 1 to 3. Findings - The regression analysis shows that productivity has a significant positive effect on the stock return through the full mediating effect of profitability and activity. Research implications or Originality - In a situation where the relationship between productivity and profitability is not clear, this study is meaningful in that it has empirically analyzed that productivity has a positive effect on the stock return by mediating effects of profitability and activity.

• 한국건설관리학회:학술대회논문집
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• 한국건설관리학회 2006년도 정기학술발표대회 논문집
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• pp.548-553
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• 2006

건설 프로젝트에 있어서 생산성은 프로젝트의 성과측정 및 향후 공사계획 수립 등 매우 중요한 공사관리의 기능을 지니고 있다. 건설 현장의 특성상 작업에 영향을 미치는 요인들이 많이 존재하며, 이러한 요인들에 의해 건설 공사에는 변화가 많이 발생하고 따라서 건설 생산성을 정확히 분석하고 예측하는 것은 매우 어려운 실정이다. 국내 대부분의 현장에서는 생산성 데이터와 관련된 정보의 수집 및 분석 방법이 체계화되어 있지 못하여 건설 생산성 관리와 관련된 사항을 대부분 현장관리자의 경험과 직관에 의존하고 있는 상황이다. 이는 건설 공사 관리의 신뢰성을 저하시키는 요인이 될 수 있으며 공사 일정에 차질이 발생할 경우 무리한 공사로 인한 부실시공이나 일정 지연 등의 결과를 초래하여 큰 손실을 야기할 수 있다. 따라서 건설 프로젝트에서 발생하는 생산성 데이터와 생산성 영향요인들을 체계적으로 수집하여 공사관리에 활용하기 위한 관리체계의 개발이 요구된다. 본 연구에서는 공동주택 구체공사의 단위작업을 중심으로 발생하는 생산성 데이터와 생산성 영향요인을 정의하고, 정보기술을 활용하여 정보의 수집 및 가공을 통한 생산성 분석의 활용 방안을 제시하고자 한다.

• Journal of Ecology and Environment
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• 제33권1호
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• pp.59-65
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• 2010

Because seagrass production significantly contributes to the biodiversity and production of coastal and estuarine ecosystems, accurate estimation of seagrass productivity is a critical step toward understanding the ecological roles of seagrass in these ecosystems. To develop an accurate and effective method of measuring seagrass productivity, we estimated leaf productivity of eelgrass (Zostera marina) on the southern coast of Korea using three methods, the conventional leaf marking method, the elongation-mass method (Short '87 method), and the plastochrone method. In each season, shoots were pierced through the bundle sheath using a hypodermic needle and were collected after 2-4 weeks had elapsed to estimate their productivity. The leaf elongation and the leaf plastochrone intervals varied significantly among seasons. On an annual basis, the conventional leaf marking method showed the lowest leaf productivity estimates compared to the elongation-mass method and the plastochrone method, suggesting that the conventional leaf marking method underestimated leaf productivity as it ignored leaf maturation processes and new leaf growth within the sheath. Since the elongation-mass method considered leaf maturation processes, this method produced higher leaf productivity estimates than the conventional leaf marking method. On an annual basis, the plastochrone method produced the highest leaf productivity estimates. Below-ground productivity, which can be easily estimated using the plastochrone method, ranged between 3.29 and 5.73 (mg dry weight $shoot^{-1}\;day^{-1}$) and accounted for about 17.8% to 30.3% of total productivity. Because of the high contributions of below-ground productivity to total seagrass production, we suggest that the plastochrone method is an effective and simple technique for assessing both above- and below-ground productivities.

• 한국건설관리학회논문집
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• 제9권5호
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• pp.86-94
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• 2008

생산성은 모든 생산조직의 견실성 및 생산 활동의 효율성 평가를 위한 매우 중요한 경영 지표 중 하나로써 생산성의 기능은 건설 산업에 있어서도 예외일 수 없다. 그러나 국내의 경우 생산성의 중요성과 그 기능에도 불구하고 건설 생산성 관리와 관련된 사항은 대부분 현장관리자의 경험과 직관에 의존하고 있으며 생산성 데이터를 데이터베이스화하여 공사계획 및 관리에 적극활용하지 못하고 있다. 이러한 문제는 생산성 데이터와 관련된 정보의 수집 및 분석 방법이 체계적이지 못한 결과로, 생산성 데이터의 효과적인 활용을 위해 우선적으로 WBS개선이 이루어져야 한다. 따라서 본 연구에서는 연구문헌 분석, 해외사례 분석으로 연구에 적용함에 따른 적합여부 및 개선사항을 도출하고, 현장 인터뷰를 통해 현장여건을 반영한 후, 설정된 기본방향을 바탕으로 생산성 데이터 수집 및 분석을 위한 WBS를 구축하였다. 마지막으로 생산성 데이터 수집 및 분석을 위한 체계로의 검증을 실시하였다. 향후 구축된 WBS를 통해 수집된 생산성 데이터는 OLAP을 이용한 생산성 분석 및 Data Mining을 이용한 생산성 예측에도 활용될 것으로 기대된다.

• 한국산학기술학회논문지
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• 제16권11호
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• pp.7885-7892
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• 2015

본 연구는 공공병원과 민간병원 간의 생산성을 자본생산성, 노동생산성, 부가가치 생산성으로 구분하여 비교분석하였으며, 연구결과를 토대로 공공병원이 양질의 의료서비스 제공하기 위해 공공성과 수익성을 안정적으로 확보할 수 있는 생산성 제고 방안을 제시하고자 한다. 조사기간은 2013년 회계연도 말을 기준으로 하였으며, 공공병원의 대상은 39개 민간병원은 108개 총 147개 병원으로 조사대상을 선정하였다. 분석방법은 ANOVA분석, 위계적 회귀분석을 실시하였다. 결론을 보면 생산성 중 노동생산성 변수들이 공공병원의 수익성에 가장 중요한 요인들로 나타났으며, 향후 공공병원의 생산성과 효율성에 큰 영향을 미치기 때문에 효과적인 인적관리체계의 수립이 요구된다. 또한 생산성과 수익성간의 연계를 통하여 분석하여야만 병원의 효율적인 관리에 대한 명확한 평가가 가능해야 할 것이다.

• 상하수도학회지
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• 제25권3호
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• pp.325-334
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• 2011

Market Environment around water work industry is rapidly changing. ISO, International Organization for Standardization, announced the international water work service standard for comparison and evaluation between nations and businesses. And developed countries in water work are introducing market principle for growth of nation's water industry and reinforcement of its competitiveness. Also, some local governments entrusted their water utilities for improvement of competitiveness of water work. However, as some failure cases from overseas came out with emphasis, there are many refuting perspective about entrusted operation achievements of domestic water market. Hence, this paper evaluated competitiveness of domestic local water utilities from the perspective of productivity. After evaluating productivity using Malmquist productivity index, the authors compared and analyzed whether there is a difference of productivity between two different operating types by using Mann-Whitney test. As a result of analysis, it has shown that local water utilities achieved higher productivity at entrusted operation type rather than direct operation type. The local water utilities which chose entrusted operation had increased the productivity 13.9% on total factor productivity(TFP) during experimenting period, while the local water utilities which chose direct operation had increased 0.2%. The background of achieving this high productivity in entrusted operation was analyzed as a result of the higher technological effectiveness of a special water company. The result of this study can be referred when local government needs to decide on what operating types they will use.

• 품질경영학회지
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• 제38권2호
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• pp.261-275
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• 2010

The purpose of this study is to empirically analyze the productivity change of the 10 Single PPM Certification Company in the 3 Industry(Electronics, Motor-Parts, Machines). In this study, Productivity change over the time in Korean small and medium sized firms in the 3 industries by the bootstrapped Malmquist Productivity Index(MPI). The traditional Malmquist Productivity Index(MPI) and Data Envelopment Analysis(DEA) Models have not only bias but also lack statistical confidence intervals. they could lead to wrong evaluations of the efficiency and productivity scores. In this paper, DEA and a MPI are combined with a bootstrap method in order to provide statistical inferences that analyze the performance of the Single PPM Certification Company. The data cover the period between 2004 and 2007. The result of this paper reveals : 1) The Electronics Industry had productivity effect of 17%, but there was not direct effect for other Industries(Motor-Parts, Machines). 2) average productivity Progress of the 7DMU(Electronics), 1DMU(Motor-Parts) and none(Machines).

• 한국건축시공학회지
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• 제13권4호
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• pp.372-381
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• 2013

In the construction industry, a great deal of research has been focused on productivity improvement because a minor change in labor productivity can often make the difference between a profit and a loss. This study shows how productivity measurement methods can be applied in practice, step by step, to analyze and identify potential problems both in productivity and methods performance for masonry work. A work sampling technique was conducted to determine the nature and extent of an observable activity as an aid to measuring overall performance. Also, a method productivity delay model was used to identify non-productivity in individual cycle times. From the work sampling technique, it was found that the masonry crew had a Labor Utilization Factor of 47.1%, and from the videotape analysis, it was found that the material and dumpster location need to be adjusted to reduce the travelling distance. We have found that efforts to improve the productivity of masonry work should be focused almost exclusively on machine and labor delays, based on the result from the method productivity delay model.

• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 2005년도 추계학술대회 논문집
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• pp.319-325
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• 2005

본 연구의 목적은 초대형 컨테이너선 기항에 따른 컨테이너터미널의 항만생산성을 예측하는 것이다. 일반적으로 컨테이너터미널의 생산성은 컨테이너크레인, 야드크레인, 야드트랙터 등을 포함한 하역시스템의 생산성에 의해 평가된다. 그러므로 부산항 컨테이너터미널의 항만 생산성으로서 컨테이너크레인의 현재 생산성을 분석하고 초대형 컨테이너선에 의한 컨테이너를 처리하기 위한 순작업 생산성과 총작업 생산성을 예측한다. 생산성 향상을 위해 하역시스템 대안과 운영시스템 대안을 요약한다.

• 산업경영시스템학회지
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• 제20권41호
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• pp.243-254
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• 1997

The fast changes of business environment make the enterprise filled with many problems which have to be solved. Productivity is a measure of the organizational performance, especially in manufacturing activities. The purpose of this paper is to measure the value-added productivity of the firms, to identify the characteristics and the relationship between key variables which affect the value-added productivity and also to study the alternative policies of productivity improvement elements which increase productivity effectiveness.