• 한국항만학회지
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• 제3권1호
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• pp.35-55
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• 1989

Today, about 99% of total import and export cargo in Korea is being transported through the port. The general trends of cargo handling show increases in capacity and speed, In order to cope with these trends, it is not only required to raise the efficiencies of port operation and function but also necessary to decide the optimal amount of the skilled labor force for cargo handling in the port. Cargo handling in the port is basically relied on the cargo handling facilities. Therefore, it is very important to reserve the amount of labor force for cargo handling system has been developed up to a certain level but the personnel management system which is the superior structure has not been followed well. In this study, therefore, we show a method to determine the required amount of labor force for cargo handling considering the amount of cargo and type of cargo handling work per each cargo, and the optimal amount labor force in cope with the fluctuation of the basic cargo handling labor force with respect to the time of in and out cargo flow in the viewpoint of minimizing the expences due to reservation of extra labor force than needed and firing employment of labor force using the Dynamic Programming. The derived algorithm is introduced into the computer simulation for Pusan port with the analyzed real data such as amount of cargo handling in the port with respect to working hour, cargo capacity, working step, the ratio of cargo handling facility and actual number of workers and we estimated the required labor force. As a result of analysis the labor force of Pusan port showed the over-employment such as maximum 21.4%, minimum 8.2% when we assumed that the averages of actual working hours and days were 8 hours in a day and 20 day in a month.

• International Journal of Internet, Broadcasting and Communication
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• 제15권4호
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• pp.294-303
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• 2023

This study was to find out the differences in self-esteem, body composition, and muscle strength of middle-aged women, and nine physical labor groups were selected as beautification workers at D University in Cheonan, and a total of 17 were selected as non-physical labor groups were 8 full-time housewives living in Cheonan. After selecting the subjects, the subjects arrived 30 minutes before the start of the experiment and completed the self-esteem questionnaire. After taking the stability, the measurement was carried out in the order of body composition, grip strength, and isokinetic muscle function, and the independent sample t-test was conducted. First, middle-aged women's self-esteem according to the type of physical labor was high in the physical labor group in relation to others among the sub-factors. Second, there was no significant difference in body composition according to the physical labor patterns of middle-aged women. Third, there was no significant difference in lower limb isokinetic muscular strength according to the types of physical labor of middle-aged women. Third, there was no significant difference in lower limb isokinetic muscular strength according to the types of physical labor of middle-aged women. The self-esteem according to physical labor is caused by the sense of belonging in the workplace, and the difference between body composition and muscular strength is insignificant. Therefore, it is necessary to introduce a physical activity program to promote self-esteem due to aging and prevent physical deterioration regardless of occupation.

• 노동경제논집
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• 제25권1호
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• pp.161-182
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• 2002

취업 중 자영업이 차지하는 비중이 상당함에도 불구하고, 자영업 선택의 결정요인에 대한 연구는 일천하다. 특히 여성에게 있어 결혼과 자녀 보육이 취업에 장애요인으로 작용하는 현실을 고려할 때 상대적으로 근로시간의 선택이 자유로운 자영업은 여성의 가사노동과 경력 유지를 병행하는 하나의 대안이라 할 수 있다. 본 연구는 여성의 취업 미취업의 선택과 피고용 자영업의 선택을 동시에 고려하는 이변량 프로빗 모형(bivariate probit model)을 "한국노동패널" 1차년도(1998) 자료에 적용하는 한편 취업한 여성을 3차년도(2000)까지 추적하여 이 기간 중 발생한 노동공급의 변화-노동시장에서 퇴장, 근로시간 증가, 근로시간 감축-의 결정요인을 다항로짓 모형(multi-nomial logit model)을 이용하여 분석한다. 취업의 선택에서 어린 자녀의 존재는 유의한 부(-)의 효과를 갖은 반면 자녀 보육 보조자의 존재는 유의한정(+)의 효과를 갖는 것으로 나타나며, 자영업의 선택에서 자녀의 존재는 정(+)의 효과를 가지나 통계적으로 유의하지는 않게 나타난다. 결혼과 어린 자녀의 수의 증가는 노동시장에서의 퇴장에 유의한 부정적 효과를 미친 반면 근로시간의 감축에는 유의한 효과를 미치지 않는 것으로 나타난다. 임금근로자와 비교할 때, 피용자가 없는 자영자와 무급가족종사자는 근로시간 증가보다는 노동시장 퇴장에서 퇴장하는 확률이 낮고 피용자가 없는 자영자는 근로시간을 감축하는 확률이 낮은 것으로 나타난다. 근로시간의 유연성으로 가사노동과 시장노동의 병립이 용이한 자영업을 잠재 여성인력의 활용과 경력단절을 막는 방안으로 고려하는 정책적 함의를 갖는다.

• 기술사
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• 제16권3호
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• pp.33-40
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• 1983

This paper is one of the case studies to improve the labor productivity of PCB assembly through Work Factor motion-time analysis and the application of the motion economy principles and the human factors engineering theory. In result, we can improve 129％ of the labor productivity by using a rotary table for the parts delivery. Therefore, it is expected that this result can be used for a lot of the manual works of the small and medium-sized industries especially.

• 산업노동연구
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• 제24권1호
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• pp.261-295
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• 2018

본 논문은 사업체패널조사 1차 년도(2005년)부터 6차 년도(2015년)까지의 자료 중 노동자 대표조직, 즉 노동조합이나 노사협의회가 존재하는 사업체를 대상으로 패널 고정효과 모형을 활용하여 경영참여 수준과 사업체의 경제적 성과 간의 관계를 검증해보았다. 분석결과 전기의 경영참여 수준이 높아질수록 일정 수준까지는 당기의 1인당 부가가치(생산성) 및 1인당 인건비(임금)가 상승하다가 그 이후 하락하는 역U자형의 패턴을 확인할 수 있었다. 이는 큰 틀에서 볼 때, 노동자 대표조직의 경영참여 동학에 관한 논리를 제공한 Freeman과 Lazear(1995)의 이론적 예측과 부합하는 결과이다. 이러한 실증분석 결과는 현재 한국의 평균적인 경영참여 수준이 매우 낮으므로, 향후 경영참여의 수준을 지금보다 다소 향상시키더라도 노사공동의 지대, 즉 생산성(1인당 부가가치)을 향상시키는 경제적 성과를 낳을 수 있다는 정책적 함의를 제공해준다.

• 한국식품조리과학회지
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• 제8권1호
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• pp.31-41
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• 1992

This study has made use of the work sampling for work analysis and productivity of food service institutions centering on 3 general hospitals of 400∼600 beds and centralized service system in Seoul. The results were as flollows; 1. In the mean work percent of dietitians: The indirect work functions marked the highest, as it was 22.0% for the direct work functions, 57.4% for the indirect work functions and 20.6% for the delays. Among the indirect work functions, the decreasing order was original clerical (38.1%), instruction or teaching (8.5%), conference or interview (8.5%), and appraisal (2.3%). 2. In the mean work percent of clerical personnels: The direct work functions (67.2%) marked the highest. Among those, routine clerical was 64.3%, and receiving was 2.8%. 3. In the mean work percent of workers: The direct work functions (77.4%) marked the highest. Among those, the decreasing order was service (24.7%), cooking (22.5%), cleaning (18.2%), and transportation (10.3%). 4. Work percent per labor hour: Dietitians usually continued to work even during the lunch time. In case of clerical personnel working in turn, work percent was high even during the lunch time, however in the other case, it was very low. It was shown that the workers had lunch and break time after every their service. 5. The number of meals served per labor hour were 6.3 meals, and labor time spent per served meal 9.8 minutes.

• 대한안전경영과학회지
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• 제17권1호
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• pp.225-230
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• 2015

Productivity is the essential comparative advantage in high tech industry company in 21 century. These company endless endeavor for low cost production. Low cost production can be led by low facility operation cost and low labor cost. But reducing facility operation cost arise much investment. Thus many high tech company drive reduction of labor cost. These article suggest model for reducing labor cost and prove a effect by example of some company.

• Journal of the Korean Society for Industrial and Applied Mathematics
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• 제18권4호
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• pp.283-294
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• 2014

In this paper we study consumption-labor supply decision of an agent who prepares for retirement at a known time in the future. The agent is assumed to have a preference which is represented by the von Neumann-Morgenstern utility function in which the felicity function has constant relative risk aversion over the composite of consumption and leisure. The composite is obtained by the Cobb-Douglas function. A general problem has been studied by Bodie et al. (2004). We contribute to the literature by deriving the Slutsky equations and conducting comparative statics. In particular, we show that wealth effect can exhibit an interesting property depending upon the time until retirement, as the interest rate increases.

• 대한지역사회영양학회지
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• 제12권5호
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• pp.630-638
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• 2007

The purpose of this study is to investigate an efficient use of labor in personnel scheduling for the restaurant industry. More specifically, this study attends to reduce overall labor cost while not sacrificing both full-time and part-time employees' schedules. The customers' demands were measured by sales in this analysis. Historically, server scheduling in the restaurant has been practiced by manager's experience and intuition; however, those practices provided drawbacks because managers often fail to consider external factors such as a employees' working conditions and change in a restaurant's size. The result of a new method in personnel scheduling provided significant cost saving compared to a previous scheduling technique. This study found that a new method in personnel scheduling allowed the restaurant to save labor cost. The outcome of this study should of for important strategic implication for the restaurant managers.

• 대한영양사협회학술지
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• 제15권3호
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• pp.262-277
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• 2009

Fresh-cut foods have been widely used in the school foodservice industry due to their convenience and saving effects of labor and working hours. This study evaluated the effectiveness of using fresh-cut foods in school foodservice with respect to cost efficiency, customer satisfaction, employee satisfaction, and productivity. First, in terms of cost efficiency, the cost of the fresh-cut food per meal price significantly increased by 2.6% via the new production plan. Meanwhile, the costs of labor and food wastes significantly decreased by 3.0% and 0.3%, respectively, after implementing the new plan. Second, customer satisfaction towards foodservice significantly increased, from 2.94 points prior to the new plan to 3.45 points. Third, foodservice productivity such as of the number of meals per full-time equivalent employee increased by 5.7 meals, from 143.0 meals to 148.7 meals after intervention. The productivity index of work hours for producing a meal also increased and was reflected by a work time reduction of 0.77 minutes, specifically from 4.25 minutes to 3.48 minutes. The labor cost per meal also decreased by 29.9 won, from 331.91 won to 301.97 won, but there was no significant difference. Through these results, we identified that using pre-process foods in school foodservice has positive effects on labor saving, customer satisfaction, and employee work satisfaction.