• Proceedings of the Korean Operations and Management Science Society Conference
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• 1994.04a
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• pp.427-431
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• 1994

The objective of this paper is to provide an inventory control policy for the system that carries a single item with a multiple demand classes, when the demand is Poisson distributed random variable. The inventory control process includes the process of determining the reorder point, and the process of inventory control during the lead time. The goal of the optimization process is to achieve the service level of each demand class as well as the system-wide total service level at a preset desired service level while sustaining a minimum average inventory.

• Proceedings of the Safety Management and Science Conference
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• 2011.11a
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• pp.727-745
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• 2011

Courier and logistics services such as customer contact employees (customer-contact employee) of the attitudes and behavior of the customer satisfaction level of service quality evaluation and a very big impact. In this study, using a typical customer contact employees, and to target the delivery service industry employees the organization's service orientation and customer orientation by examining the impact on the quality of companies within the organization for growth and development needs and the importance of service orientation will be trying out for. The results of this study can be summarized as follows. First, the chief executive of the organization to configure a service orientation and a detailed understanding of the factors that determine this by managing the organization to effectively come up with a way to make and ultimately the organization's service orientation, organizational culture can be positioned as effort should be taken. Second, service companies through regular training and education to maintain a certain level of service quality should be. Third, the service organization's service orientation is not a fad or a means of sustain and develop the company's survival strategy is to get out. To do this, good communication between the field and management can be achieved by a variety of channels to be established, and management's willingness to provoke sympathy for the employees should be provided.

• Proceedings of the Korean Society for Agricultural Machinery Conference
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• 1993.10a
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• pp.546-550
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• 1993

Three basic experiments in agricultural machinery management , strengthening the construction of socialized service system, facilitating the two-level management system in rural areas and carrying through the principle of " paid service ' are described and the main methods of strengthening agricultural machinery management are developed in this paper.aper.

• Journal of the Korea Safety Management & Science
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• v.3 no.3
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• pp.65-75
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• 2001

This research fundamentally deals with an analysis of service level for a multi-level inventory distribution system which is consisted of a central distribution center and several branches being supplied stocks from the distribution center, Under continuous review policy, the distribution center places an order for planned order quantity to an outside supplier, and the order quantity is received after a certain lead time. Also, each branch places an order for particular quantity to its distribution center, and receives the order quantity after a lead time. In most practical distribution environment, demands and lead times are generally not fixed or constant, but variable. And these variabilities make the analysis more complicated. Thus, the main objective of this research is to suggest a method to compute the service level at each depot, that is, the distribution center and each branch with variable demands and variable lead times. Further, the model will give an idea to keep the proper level of safety stocks that can attain effective or expected service level for each depot.

• Proceedings of the Korean Society for Quality Management Conference
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• 2007.04a
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• pp.279-284
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• 2007

This study develops a model which measures service standardizations focused on the process of call center service. It analyzes the relationship between service standardizations and efficiency of business as well. The model consists of two dimensions to offering service and managing customers. These two dimensions have six major elements: accessibility, customer orientation, professionalism, offering a solution, customer satisfaction management, and customer information management. Also we assumed that low customer interaction and labor-intensive of service business increase the level of service standardization.

• Korean Management Science Review
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• v.28 no.3
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• pp.15-29
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• 2011

In this paper, we consider a system working at both primary service and secondary service. A server can switch between the primary service and the secondary service or it can be assigned to secondary service as a dedicated server. A service policy is characterized by the number of servers dedicated to the secondary service and a rule for switching the remaining servers between two services. The primary service system is modelled as a Markovian queueing system and the throughput is a function of the number of servers, buffer capacity, and service policy. And the secondary service system has a service level requirement strategically determined to perform the service assigned. There is a revenue obtained from throughput and costs due to servers and buffers. We study the problem of simultaneously determining the optimal total number of servers, buffers, and service policy to maximize profit of the system subject to both an expected customer waiting time constraint of the primary service and a service level constraint of the secondary service and develop an algorithm which can be successfully applied with the small number of computations.

• International Journal of Highway Engineering
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• v.18 no.4
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• pp.9-18
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• 2016

PURPOSES : This study aimed to evaluate the performance of pavement management works and to develop a function for estimating the level of service (LOS) and cost of service (COS) for the systematic and quantitative management of pavement performance in the public sector. METHODS : The International Roughness Index (IRI) was used as the performance index for pavement management. Long-term pavement performance data for a period of 7 years (2007-2014) collected by the National Highway Pavement Management System and historical maintenance budget data published by the South Korean government were used to develop the LOS-COS function. Based on the function, a model for estimating the appropriate budget as well as the network conditions was suggested. RESULTS : There was high degree of correlation between pavement performance and the investment level (R = - 0.74). The developed LOS-COS function suggested that the unit cost to improve the network IRI to 1 m/km was 32.6 billion KRW. Further, the maintenance costs normalized with respect to the LOS levels were LOS-A = 88.2 billion KRW, LOS-B = 55.6 billion KRW, and LOS-C = 23.0 billion KRW. CONCLUSIONS : This study proposes a simple way of developing a LOS-COS function. It also shows how to develop a network budget demand and condition estimation model using the LOS-COS function. In addition, it is the first attempt to evaluate the road maintenance budget in South Korea. It is expected that these results will help in the negotiations between the road managers and budget makers.

• Journal of Korean Academy of Nursing
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• v.42 no.7
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• pp.928-935
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• 2012

Purpose: The current study was done to identify individual- and group-level factors associated with health care service utilization among Korean medical aid beneficiaries by applying multilevel modeling. Methods: Secondary data analysis was performed using data on health care service reimbursement and medical aid case management progress from 15,948 beneficiaries, and data from 229 regions were included in the analysis. Results: Results of multilevel analysis showed an estimated intraclass correlation coefficient (ICC) of 18.1%, indicating that the group level accounted for 18.1% of the total variance in health care service utilization, and that beneficiaries within the region are more likely to share common features with regard to health care service utilization. At the individual level, existence of disability and types of medical aid beneficiaries showed a significant association, while, at the group level, social deprivation index, and the number of beneficiaries and case managers within the region showed a significant association with health care service utilization. Conclusion: The significant influence of group level variables in health care service utilization found in this study indicate a need for group level approaches, such as policy change and/or promotion of community awareness.

• Journal of Korean Society for Quality Management
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• v.44 no.4
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• pp.965-981
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• 2016

Purpose: This study aims to propose Kano-SERVQUAL integrated approach as an effective tool for evaluating auto service quality attributes to enhance the use of SERVQUAL. Methods: The Kano-SERVQUAL survey was conducted to evaluate customer perception for 28 auto service quality attributes which were obtained from auto service expert in 'H' company. The correlation analysis of SI(Satisfaction Index), DI(Dissatisfaction Index) and expectation values are conducted in this study. Results: The 28 auto service quality attributes are classified into attractive attributes and one-dimensional attributes. The results of this study show that the correlations between the customers' expectation values and DI is strongly positive correlation with 1% significance level, expectation values and SI is negative correlation with 10% significance level. Conclusion: The results show that the purposed Kano-SERVQUAL integrated approach provides a deeper understanding of service quality attributes in that it distinguishes the customers' expectation values between highly expected attributes(e.g. must-be attribute) and less expected attributes(e.g. attractive attribute).

• Journal of the Korean Dietetic Association
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• v.6 no.2
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• pp.148-160
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• 2000

The purpose of this research was to analyze the tasks on foodservice ․ clinical nutrition service in hospital dietetic departments. A survey of 30 hospital food and nutrition service departments was undertaken and detailed informations were collected from each, including surveys of 176 dietitians and 30 foodservice managers. Statistical data analysis was completed using the SAS/win 6.11 package for descriptive analysis and t-test. The results of this study can be summarized as follows : Regarding dietitian's training period, 38.6% dietitians answered that they spent 1~2 years in mastering food service management. 28.4% dietitians replied that they needed 2~3 years in learning clinical nutrition management. It was shown that 48.9% dietitians were engaged in food service management, while 26.7% were engaged in clinical nutrition and 26.7% were engaged in both. The 13 elements of food service management showed low performance level. These elements were food temperature, food intake, menu selection, contaminated substances and serving mistake and reliance on hospital food. These should be controlled with caution. The average score of dietitian's life satisfaction within the work place was 3.42 out of 5. The most dissatisfactory element was physical environment of the workplace. 5 elements for improving nutrition service activities showed low performance level with high importance score. Problem analysis showed low difference score between importance and performance level. Hospitals under contract foodservice management received higher points on clinical nutrition performance(P<.05) than hospitals under self-operated foodservice management.