• 보건행정학회지
• /
• 제6권2호
• /
• pp.1-13
• /
• 1996

To evalate the efficiency of public and private hospitals, the author used Data Envelopment Analysis(DEA), a mathematical linear programming method calculating the of ficiency of a unity(DMU: Decision Making Unit) in relation to the other units in analysis. DEA was applied to thirty three (10 public and 23 private) general hospitals wiwith 160 to 299 beds. In respect to productivity, public hospitals appeared to be a little more efficient than private ones, even though it's statisticansignificant. However, the efficiency score for profitability conversed that these contrary results were due to the caring of more medical protection patients in public hospitals, who brought less revenlue to te hospital than other patients. Public hospitals' superiority to private counterparts in productivity, which are aguged mainly based on cared patients, suggests that the former contributes so much positively to social utility. In particular, the fact that public hospitals are caring more medical protection patients, namely the poverty group whom the society should bear a burden of by all means, seems to be desirable in respect of role of publi hospitals.

• Industrial Engineering and Management Systems
• /
• 제13권2호
• /
• pp.210-220
• /
• 2014

This article describes a 2-in-1 methodology utilizing simulation optimization technique and Data Envelopment Analysis in measuring an accurate efficiency score. Given the high level of stochastic data in real environment, a novel methodology known as Data Collection Budget Allocation-Data Envelopment Analysis (DCBA-DEA) is developed. An example of the method application is shown in banking institutions. In addition to the novel approach presented, this article provides a new insight to the application domain of efficiency measurement as well as the way one conducts efficiency study.

• 복식
• /
• 제43권
• /
• pp.169-186
• /
• 1999

The objectives of the present study were to investigate the relationship between self-concept and clothing buying pattern in accordence with their self-concept. The method employed to conduct this study was normative-descriptive survey using questionnaires. Subjects were 438 high school girls in Seoul and the survery was implemented from the begining of May 1998 to the end of June 1998. The questionnaires were completed by students during class. Mean Standard Deviation Chi-Squeare and t-test were employed to analize the data gathered. The results are summarzed as follows: (1) The group who has the higher score in total positive self, self identity self satisfacton self behavior physcial self moral ethical self personal self and family self cares more about economical efficiency of clothing than the group who has the lower score. (2) The group who has the higher score in total positive self, self satisfaction personal self and family self attachs greater importance to the practical use of clothing than those who scored lower with in said categories of self concept. (3) The group who has the higher total positive self score cares originality more than the group who has the lower score when they purchase outdoor garment. (4) The group who has the lower social self score cares modesty and ostentation more than the group who scored higher in social self. (5) The group who has the higher score in positive self behavior personal self and family self cares about convenence in care and maintenance of the clothing than the group has the lower score. (6) Friends buying and use experiences of herself and the observation of other's attire are the main source of fashion information for the present Korean high school girls. The group who has the higher score in total positive self personal self family self, self identity self satisfactio self behavior used their own experiences more often as a source of fashion information than those who scored lower with in said categories of self concept. The group who has the higher score of total positive self personal self family self, self identity self satisfaction self behavior uses family members more often as a source of fashion information than those who scored lower with in said categories of self concept. The group who has the higher score in self identity and self behavior uses store displays more often than the group who scored lower. (7) Bonded processing goods stores or fancy goods shops(haberdashery) located in trendy shopping district discount stores and outlet stores of the famous manufactures are main places where Korean high school girls buy their outdoor garments. The group who has the higher score in social self, self identity and personal self uses department stores more often and rerely shops at bonded processing goods stores of fancy goods shops located in thendy shopping district compared to those who scored lower with in said categories of self concept.

• 농업과학연구
• /
• 제46권2호
• /
• pp.229-237
• /
• 2019

The influence of dietary supplementation with a yeast culture on growth performance, fecal score and nutrient digestibility was evaluated in weaned pigs in a 6-week feeding trial. A total of 50 weaning pigs with an initial average body weight (BW) of $7.46{\pm}1.60kg$ were randomly allotted into 1 of 2 dietary treatments according to the initial BW. There were 5 replicate pens in each treatment with 5 pigs per pen. The dietary treatments were as follows: 1) control, basal diet (CON) and 2) 0.10% yeast culture, basal diet supplemented with 0.1% yeast culture (YC). The average daily feed intake was significantly improved with the dietary supplementation of the yeast culture compared with the control during phases 1 and 3. Overall (0 to 6 weeks), dietary supplementation with the 0.1% yeast culture had a significant effect on the feed conversion ratio (FCR). There was no significant difference in the fecal score between the CON and YC dietary treatments. In addition, no difference in the apparent total tract digestibility was observed between the CON and YC dietary treatments. Collectively, the results of this study indicate that dietary supplementation of 0.1% yeast only improved the feed intake of weaning pigs; however, yeast culture supplementation did not affect the average daily gain, feed efficiency, total tract digestibility of dry matter, and nitrogen and energy levels as well as the fecal scores.

• 수산경영론집
• /
• 제46권3호
• /
• pp.143-161
• /
• 2015

This study presents a comparative analysis on mackerel distribution process and price formation process, and investigation of price and margin between traditional markets and Large-scale discount store distribution channel. Through this, the study investigated distribution efficiency of each channel, and examined whether a difference of distribution efficiency leads to a difference of performance through the investigation of a difference of function and role between members of a wholesale market and vendor of Large scale discount store. The following are the results of this study. As a consequence of investigating supply and sum by distribution channel of mackerel, it appeared that mackerels shipped from port market are distributed into 9 consumption sites(Wholesale market, Large scale discount store, Institutional Food Service, etc.). In the comparison of distribution efficiency between traditional retail store and Large scale discount store 52.0% margin is formed in traditional retail store distribution channel and 43.1% margin is formed in Large scale discount store, and a distribution cost rate consists of 19.4% cost in a traditional retail store for fishery products and 18.1% cost in a Large-scale discount store. To analyze a difference of performance, the study examine a difference of role and function between vendor and Wholesale market company, wholesaler and middleman. Wholesale market company and middleman of wholesale market for consumer have slightly high or similar score in collection function, sorting function, evaluation function and financial function which are traditional and original. However, it was confirmed that vendor has a better score in other functions, that is, newly-demanded functions(ex : market frontier function, product development function, Integral Distribution Function, etc.).

• 한국유기농업학회지
• /
• 제22권1호
• /
• pp.1-23
• /
• 2014

The purpose of this paper was to measure technical efficiencies and scale efficiencies of Korean seed industry by DEA method, and to identify the factors affecting the efficiencies by Tobit regression model. Survey data of 50 seed companies nationwide were applied for the analysis. The average score of overall technical efficiency for the surveyed companies in 2012 was 0.44, which is decomposed into pure technical efficiency 0.68 and scale efficiency 0.63. A majority of the seed companies exhibited at least one form of inefficiency except a few companies in optimal scale. It was also shown the most companies were operating in the stage of increasing returns to scale, which implies Korean seed companies are mainly in smaller scale than optimal. Additional results suggest that the Center for Private Seed Companies, which will be established at Gimje in 2015, plays an important role to make domestic seed companies improve their scale efficiency as well as pure technical efficiency by way of enlarging their size and co-using the high technology in the Center.

• 유통과학연구
• /
• 제15권11호
• /
• pp.49-57
• /
• 2017

Purpose - In Korea, general super markets have a great impact on the market performance of traditional markets. We propose a modified two stage DEA model for evaluating the performance of traditional markets in Incheon, Korea by identifying the influence of external environmental factors including the presence of general super markets as non-discretionary variables in DEA. Research design, data, and methodology - After obtaining bias-corrected estimates of original DEA efficiency scores using the input and output data of 49 traditional markets, we regress them on several external environmental factors by bootstrap-truncated regression. Results - We obtain bias-corrected efficiency scores from the original DEA efficiency scores by bootstrap and among the five environmental factors, the residential population and the presence of general super markets or SSMs can be considered as the driving forces influencing bias-corrected efficiency scores, positively and negatively, respectively. Conclusions - When DEA efficiency scores tend to be overestimated, we need to use a biased-corrected efficiency score by bootstrap. It is important to note that the efficiency of traditional markets can be largely influenced by external environmental factors such as the presence of general super markets or SSMs that traditional markets can not control. Therefore, it is desirable to consider such environmental factors appropriately for a reasonable performance evaluation.

• 벤처창업연구
• /
• 제6권4호
• /
• pp.137-152
• /
• 2011

슘페터식 혁신은 이제 제조, 서비스산업을 넘어 농산업에서도 나타나고 있다. 농산업은 과거 가족농 중심의 단순생산체제를 탈피하여, 생산과 유통 전반으로 기업화되어 가는 경향이 나타나고 있는데, 이는 농산업부분에서의 낮은 생산성과 부가가치를 제고하기 위한 생산방식과 조직형태의 혁신이라고 볼 수 있다. 본 연구는 우리나라 농산업의 새로운 시도로 도입된 농업법인 그중에서도 농업생산법인의 생산성 수준을 파악하고 정책적 시사점을 도출하기 위하여 자료포락방법의 개선된 형태인 부트트래핑 자료포락방법을 활용하여 분석하였다. 본 연구의 주요 발견점은 다음과 같다. 분석대상 농업생산법인 중 효율성 값이 1인 효율적인 법인 수는 18.06%에 불과하며 효율성 값이 0.5 미만인 비효율적인 농업생산법인 수는 기술효율성에서는 30.92%, 순수기술효율성에서는 18.93%, 규모의 효율성에 있어서는 3.32%로 나타나 상당수의 농업생산법인이 비효율적인 상태에서 운영되고 있다. 이러한 분석결과는 농업생산법인이 농산업의 생산성 향상을 위한 방안으로 도입되기는 했지만 실질적 생산성 정도는 저조하다는 것을 의미하는 것으로, 농업생산법인의 생산성 제고를 위한 정책적, 전략적 차원의 개선책이 모색되어야 함을 보여 시사한다.

• 수산경영론집
• /
• 제46권2호
• /
• pp.111-125
• /
• 2015

This study is to analyze the efficiency of Korean sea food manufacturing using Data Envelopment Analysis. Firstly, based on an output oriented traditional CCR, BCC model, the study estimated the efficiency scores. The average estimates of technical, pure technical, and scale efficiency turned out 0.6517, 0.7184, 0.9074 respectively, which are separated for 50 marine corporations. The 10 DMUs were efficient under CCR model while the 17 DMUs under BCC model. Also, the study suggested that the operating profit of the two output factors should be more increased relatively and averagely from the viewpoint of efficiency improvement. Secondly, super efficiency scores are estimated under super efficiency and SBM model. As a result, it came to be possible to distinguish and rank the efficiency of the efficient DMUs. The highest score was 4.2975 under Super-CCR, was 2.4947 under Super-BCC, was 2.7160 under SBM-Super-CCR, and was 1.5319 under SBM-Super-BCC model. The average estimates of super efficiency were 0.76 and 0.82 under Super-CCR and Super-BCC model respectively, and were 0.61 and 0.67 under SBM-Super-CCR and SBM-Super-BCC model. Finally, the study conducted a rank-sum test, Wilcoxon-Mann-Whitney test, to find a statistical significance of heterogeneity existing in efficiencies among the sample corporations. The result showed that there was a significant difference in average efficiency between Dried, Salted product manufacturing and Frozen product manufacturing under BCC-Super efficiency model at 10% level of significance. Furthermore, TOBIT model was applied to find out the potential factors that might influence the efficiency, Wilcoxonand the results showed debt and sales cost influenced all of the technical, pure technical, and scale efficiency, while net profit influenced only the technical efficiency.

• 산업경영시스템학회지
• /
• 제33권4호
• /
• pp.69-78
• /
• 2010

Multi-criteria ABC inventory classification is one of the most widely employed techniques for efficient inventory control, and it considers more than one criterion for categorizing inventory items into groups of different importance. Recently, Ramanathan (2006) proposed a weighted linear optimization (WLO) model for the problem of multi-criteria ABC inventory classification. The WLO model generates a set of criteria weights for each item and assigns a normalized score to each item for ABC analysis. Although the WLO model is considered to have many advantages, it has a limitation that many items can share the same optimal efficiency score. This limitation can hinder a precise classification of inventory items. To overcome this deficiency, we propose a context-dependent DEA based method for multi-criteria ABC inventory classification problems. In the proposed model, items are first stratified into several efficiency levels, and then the relative attractiveness of each item is measured with respect to less efficient ones. Based on this attractiveness measure, items can be further discriminated in terms of their importance. By a comparative study between the proposed model and the WLO model, we argue that the proposed model can provide a more reasonable and accurate classification of inventory items.