• Proceedings of the Korean Information Science Society Conference
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• 2003.10a
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• pp.520-522
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• 2003

통신망의 발전으로 사용자는 새로운 인터넷 서비스를 요구하게 되었다. 이러한 서비스의 대부분은 멀티 캐스팅을 사용하며, 전송되는 데이터는 대용량의 멀티미디어 데이터가 주를 이루고 있다. 멀티미디어 서비스는 일정한 수준의 서비스를 위하여 신뢰도를 보장해야만 한다. 신뢰도는 경로의 흡수와 관련되어 있다. 즉, 경로에 포함된 홉의 수가 많아지면 그 경로를 통한 서비스의 신뢰도는 떨어지게 된다. 이러한 이유로 전송에 관련된 경로의 홉수에 제한을 두는 것은 통신의 신뢰성을 위하여 고려되어져야하는 중요한 문제이다. 본 논문에서는 멀티캐스트 트리의 각 경로의 흡수와 비용의 관계를 알아보기 위해 유전자 알고리즘과 개미 알고리즘을 사용한다.

• Journal of Digital Convergence
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• v.17 no.6
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• pp.159-167
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• 2019

This study was done to analyze the effect of logistics services, corporate image, product reliability and customer service on consumer satisfaction and repurchase intention that e-commerce users perceive. The survey was divided into "logistics services, corporate image, product reliability, customer services, customer satisfaction, repurchase intention". As a study result, independent variables such as corporate image, product reliability and customer services were found to affect customer satisfaction. Consumer Satisfaction had an effect on repurchase intention in mediated and dependent variable. In conclusion, in order to increase the repurchase intention in companies that introduced SCM, it was necessary to improve the corporate image, product reliability and customer service to satisfy consumers. Logistics services had not been adopted as an impact on customer satisfaction. We should strive to improve customer satisfaction and repurchase intention by creating a higher level logistics services.

• Proceedings of the Korea Contents Association Conference
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• 2010.05a
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• pp.613-615
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• 2010

이 연구는 민간경호경비조직의 서비스품질과 고객만족 및 로열티의 관계를 규명하는데 목적을 두고 있다. 이를 위해 이 연구에서는 서울시 소재 민간경호경비회사의 서비스를 이용하고 있는 고객을 대상으로 집락무선표집법을 활용하여 총 209명을 표집하였다. 설문지의 타당도 및 신뢰도를 검증하기 위하여 이 연구에서는 전문가회의와 요인분석을 통하여 타당도를 검증하였으며, 신뢰도분석을 통하여 신뢰도검증을 실시하였다. 통계처리방법은 SPSSWIN 17.0프로그램을 활용하여 요인분석, 신뢰도분석, 다중회귀분석과 경로분석을 실시하였다. 결론은 다음과 같다. 첫째, 서비스품질이 좋을수록 고객만족은 높아진다. 둘째, 서비스품질이 좋을수록 로열티는 강화된다. 셋째, 고객만족이 높을수록 로열티는 높아진다. 넷째, 서비스품질은 고객만족 및 로열티에 인과적 영향을 미친다.

• Journal of the Korean Society for Railway
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• v.14 no.1
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• pp.6-10
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• 2011

This article deals with a problem of setting reliability targets of the railroad systems where the punctuality target is given to the operator and a penalty is imposed for the year when the target is not met. The operator should set the reliability targets of the railroad system and sub-systems because the reliability affects the expected number of years when the penalty is imposed. This paper presents a procedure for setting the service reliability target and equations to calculate the expected number of years when the penalty is imposed and the probability that the operator should pay the penalty per year according to the mean kilometer between service failures of the railroad system and sub-systems.

• Asia-Pacific Journal of Business Venturing and Entrepreneurship
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• v.7 no.3
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• pp.133-141
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• 2012

Service and manufacturing companies' efforts are increasingly focused on utilizing services to satisfy customers' needs and survive in today's competitive market environment. The value of services depends mainly on service reliability that is identified by satisfaction derived from the relationship between customer and service provider. In this paper, we extend concepts from the failure modes and effects analysis of tangible systems to services. We use an event-based process model to facilitate service design and represent the relationships between functions and failures in a service. The objective of this research is to propose a method for evaluating service reliability based on service processes using fuzzy failure mode effects analysis (FMEA) and grey theory. We define the failure mode of service as interaction ways that can be failed in a service delivery process. The fuzzy set theory is used to characterize service reliability based on linguistic terms during FMEA. Grey theory is employed to determine the degree of relation and ranking among risk factors that are represented as potential failure causes. To demonstrate implementation of the proposed method, we use a case study involving a typical automotive service operation.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.23 no.2
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• pp.157-168
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• 2013

The social network service is the bidirectional media that all of the users are be able to directly produce, process, and distribute the information without distinction of the producer and consumer. Over increasing the users rapidly, the users are be able to obtain and share the various information, but the problems occur due to the spread of unreliable information on the service. Moreover, it is spreading the problems violating the privacy and decreasing the reliability of the users by exploiting the open environment. Therefore, sensitive information can be delivered only to users which information producer can trust, and the users should get the information from the trustworthy users. Due to this necessity, it needs the efficient method can evaluates the reliability of the users. In this paper, we define the reliability in the service, make the trust parameter by using the function of the service, and propose the dynamic user reliability evaluation scheme evaluating the reliability of users. We draw the trust range on the reliability of users by analyzing the proposed reliability evaluation scheme.

• The Journal of the Korea Contents Association
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• v.19 no.10
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• pp.698-711
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• 2019

The purpose of this study was to investigate the effect of social servicescape on customer satisfaction, customer trust, and customer loyalty. Data were collected from 311 adults who lived in Daegu where they had used Japanese restaurants. For data analysis, frequency analysis, factor analysis, regression analysis and multiple regression analysis were used. Through the factor analysis, the social servicescape of Japanese restaurant was identified as two components of human service and customer similarity. As a result of the multiple regression analysis, two components of social servicescape have positive effects on customer satisfaction and customer trust, and have a partial positive effect on customer loyalty. The results of regression analysis showed that customer satisfaction had a positive effect on customer trust and customer loyalty. In addition, customer trust has a positive effect on customer loyalty. The results of this study confirmed the influence of social servicescape on Japanese specialty restaurants and suggested practical and theoretical implications.

• Electronics and Telecommunications Trends
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• v.9 no.1
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• pp.81-86
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• 1994

신뢰성이란 주어진 기간동안 주어진 조건하에서 요구되는 기능을 성공적으로 수행할 수 있는 확률을 말한다. BISDN의 신뢰성이란, BISDN이 제공하는 서비스의 연속성을 위한 중요한 인자이다. 본고에서는 BISDN 서비스를 제공하기 위한 네트워크에 대해 신뢰도 목표치를 제시하고, 의사기준접속을 바탕으로 네트워크의 각 구성요소에 대해 네트워크의 신뢰도 목표치를 할당하여 각 구성요소의 신뢰도 목표치를 제시하였다. 또한 네트워크의 구성요소중 교환기에 대한 신뢰성 평가척도인 신뢰도 파라미터에 대해 서술하였다.

• Journal of Korea Game Society
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• v.11 no.6
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• pp.53-60
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• 2011

Since the importance of software reliability for game service increases continuously, the reliability evaluation becomes very important. This research performed an experiment which was intended to analyze the effect of software verification and validation, a representative activity of the software development process, on the software reliability. The results from the experiments provided the reliability evaluation based on the development process (e.g., Bayesian Belief Network based reliability estimation) with very useful bases.

• The Journal of the Korea Contents Association
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• v.10 no.1
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• pp.426-435
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• 2010

The object of this study was to develop an index of service quality of waterparks and verify the validity and reliability of the index. This study represents the waterparks user population in 2009, and 250 people were extracted by using the purposive sampling method. In other words, five locations have major waterparks were chosen and 50 people per each location were collected. Conference, panel survey, exploratory factor analysis and confirmatory factor analysis were performed to verify the validity of the questionnaire while item analysis, interrater reliability and internal consistency reliability were conducted to probate the reliability. Through these methods and procedures, the results of this study like these; (i) Validity of this index was significantly high and the index include amenity/cleanness, safety, price, programs, facilities, accessibility and promotion. Among them, amenity/cleanness was the major factor for the validity value; (ii) Reliability of this index was also high. There are high correlations between questions and fields and questions and total score. And the Cronbach's $\alpha$ values of the internal consistency reliability was over 0.603 except in the case of promotion which was below 0.6. After all the analysis, the index of service quality proved to be very proper and reliable index. Therefore, the major factors of service quality have to be figured out and reflected to the management innovation to improve service quality of waterparks.