• 보건행정학회지
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• 제13권3호
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• pp.21-34
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• 2003

Patient revisit to used hospital is a key factor in determining a health care organization's competitive advantage and survival. This article examines the relationship between customer's satisfaction and his/her revisit associated with three different methods which are the Chi Square Automatic Interaction Detection(CHAID) for segmenting the outpatient group, logistic regression and neural networks for addressing the outpatient's revisit. The main findings indicate that the important factors on outpatient's revisit are physician's kindness, nurse's skill, overall level of satisfaction, hospital reputation, recommendation, level of diagnoses and outpatient's age. Among these ones, physician's kindness is the most important factor as guidelines for decision of their revisit. The decision maker of hospital should select the strategy containing the variable amount of the level of revisit and size of outpatient's group under the constraint on the hospital's time, budget and manpower given. Finally, this study shows that neural networks, as non-parametric technique, appear to more correctly predict revisit than does logistic regression as a parametric estimation technique.

• Communications for Statistical Applications and Methods
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• 제18권3호
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• pp.277-286
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• 2011

Global companies can sell their products with dierent warranty periods based on location and times. Customers can select the length of warranty on their own if they pay an additional fee. In this paper, we consider the warranty period and the repair time limit as random variables. A two-dimensional warranty policy is considered with repair times and failure times. The repair times are considered within the repair time limit and the failure times are considered within the warranty period. Under the non-renewable warranty policy, we obtain the expected number of warranty services and their variances in the censored area by warranty period and repair time limit to conduct a warranty cost analysis. Numerical examples are discussed to demonstrate the applicability of the methodologies and results using field data based on the proposed approach in the paper.

• 한국환경과학회지
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• 제23권8호
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• pp.1395-1407
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• 2014

Coal seam gas (CSG) production involves extracting methane from coal seams with ground water which is so called a primary by-product of this process, and is often rich in salts and other constituents. The predicted large volume and variable quality of this water make water management a topic associated with CSG production. In the past, the amount of this water used to be pumped into the vacant aquifer, or into the river during the life of individual production wells. Australian government make a strategies for management and beneficial use of the water. From this point of view, a detailed assessment has not been undertaken, it is necessary for water resource production to analysis the "Coal Seam Gas Water (CSG Water) Management Policy Study" published in Queensland, Australia.

• 대한산업공학회지
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• 제24권1호
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• pp.137-144
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• 1998

Block stacking, which involves the storage of unit loads in stacks within storage rows, is typically used in traditional warehouses to achieve a high space utilization at a low investment cost. In this paper, assuming that the demand size from a customer is an i.i.d. random variable, we develop a probabilistic block stacking storage model and its algorithm for a singles product, which minimizes the time-overage floor space requirement under an (s, S) inventory policy and the violation of the FIFO lot rotation rule only in a single partially-occupied row.

• 한국경영과학회지
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• 제12권1호
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• pp.27-33
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• 1987

A stochastic model for an inventory system in which depletion of stock takes place due to random demand as well as random loss of items is studied under the assumption that the intervals between cussessive unit demands as well as those between cussessive unit losses, are independently and identically distributed random variables having negative exponential distributions with respective parameters .mu. and .lambda. It is further assumed that leadtime for each order is an outstanding-order-dependent random variable. The steady state probability distribution of the net inventory level is derived under the continuous review (S -1, S) inventory policy, from which the total expected coast expression is formulated.

• 보건행정학회지
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• 제9권1호
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• pp.178-200
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• 1999

The present study purports to examine the relationship between organizational and occupational commitment and to find the determinats of occupational commitment for salaried physicians working in hospitals. For the purpose of comparison, those of hospital administrative and clerical employees were also investigated for the purpose of comparison. The sample for jthis study consists of 77 salaried physicicas and 185 administrative and clerical employees (comparison group) from two university hospitals in Seoul and its surburbs. Data were collected by questionnaires and analyzed using ANOVA, ANCOVA, and multiple regression. The main findings of the study are as follows : 1) organizational and occupational commitment were positively correlated for both salaried physicans and clerical employees; 2) the variable of job variety had a positive impact on occupational commitment for salaried physicians; and 3) three variables of fairness of rewards, autonomy, and job variety had positive impacts for clerical employees. These findings were discussed and implications for organizational analysts and hospital administrators were suggested.

• Asian Journal of Innovation and Policy
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• 제6권2호
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• pp.192-205
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• 2017

The aim of this study is to investigate the relative impact of the image of information service on customer's perceived value and satisfaction of R&D information. It also seeks to assess the moderating effect of service users' skills on the value of the service image on the customer. For this purpose, a field study was conducted on users of a public R&D information service called NTIS (National Technology Information Service) in Korea. The findings show that the information service image has a significant impact on customers' perceived value and satisfaction. In addition, customers' perceived value is found to be an important indicator in strengthening customer satisfaction. Findings also reveal that individual personal computer skills moderate the relationship between service image and information value. Further research is needed to strengthen the independent variable in view of the increasing pressure to improve public service quality and customer management.

• 수산경영론집
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• 제25권1호
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• pp.61-84
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• 1994

The Fishery Household Concept is very important, because it furnish the basic information for Fisheries Policy Decision. But it is issued because the Established Fishery Household Concept is not fully reflected present Fisheries Situation. The Targets of Fisheries Policy in Korea can mainly classified Three, that is the stable Supply of Sea Food, Achievement of more high Fishery Household income, the Construction of more Comfortable Fishery Village. For Attainment these targets, the Criterion of Fishery Household Concept should be changed to 60 days from fishery working days,30 days. Also One of the Fishery Household Criterion should be inculuded Income Variable like Farm Household Criterion. This is needed to pay attention because it can provide against Trade Liberalization.

• 한국철도학회논문집
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• 제8권3호
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• pp.235-243
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• 2005

Following the rail reform in 2004, rail industry in Korea has separated into two parts: one is the infrastructure manager and the other is train operator. Amongst many aspects, track access charging system is one of the imminent aspects to be studied closely to make the rail reform successful. In this study, track access charging systems of European countries are closely investigated and compared one another and lessons learnt from their experiences are derived. Finally, policy directions regarding the track access charging system to be adopted in Korea are suggested.

• Pediatric Infection and Vaccine
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• 제15권1호
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• pp.12-19
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• 2008

Varicella is a highly infectious disease caused by the varicella zoster virus. The varicella vaccine was developed by Michiaki Takahashi in Japan in 1974. Despite the worldwide distribution of efficient vaccines, varicella vaccination policy is extremely variable from country to country. Although varicella vaccine is not currently recommended for universal vaccination in Japan, most countries throughout Europe, and developing countries, it had been introduced into Korea in 1988 and 20 years have elapsed since its use. Currently, varicella vaccine has been most extensively used in the United States where routine 2-dose vaccination program has been recently implemented for children. Recent 2-dose schedule in the United States and the availability of combination measles-rubella-varicella vaccines may lead to future varicella vaccination policy changes in many countries. With this background, this article summarizes the current status of varicella vaccination policies worldwide and presents provisional updated recommendation of varicella vaccination in Korea.