• 한국정보통신학회논문지
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• 제12권5호
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• pp.942-947
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• 2008

클러스터 서버는 front-end 노드와 여러 backend 노드로 구성된다. backend 노드 수의 증가로 더 많은 클라이언트들에게 QoS(Quality of Service)를 보장하는 스트리밍 서비스를 할 수 있지만, backend 노드의 오류 가능성도 이와 비례하여 증가한다. 서버의 장애는 모든 스트리밍 서비스를 중단시킬 뿐 아니라 현재 재생 위치 정보도 잃어버린다. 본 논문에서는 backend 노드가 오류 상태가 될 때, 끊이지 않는 스트리밍 서비스를 지원하기 위한 복구 방법을 제안한다. 클러스터 기반의 VOD 서버 구조를 고려하지 않고, 기본적인 장애복구 기술을 사용한 애플리케이션은 복구를 위한 내부 네트워크 성능의 병목현상과 backend 노드들의 비효율적인 CPU 사용을 야기시킨다. 본 논문에서는 이러한 문제를 해결하기 위해, 파이프라인 개념을 이용한 새로운 장애 복구 방법을 제안한다.

• 한국산학기술학회논문지
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• 제15권10호
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• pp.6076-6083
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• 2014

서비스 복구에 관한 선행연구는 원상태로의 서비스 복구가 가능하다는 전제하에 이루어졌다. 하지만 본 연구는 국내외 최초로 원상태로 복구 불가능한 서비스 문제에 초점을 두고, 다양한 문제들을 유형별로 분류하고 각 하위 유형을 살펴보았다. 또한 복구 불가능한 서비스 문제를 겪은 고객의 감정, 행동유형, 그리고 기업의 대응유형 등을 분석하여 좀 더 고객의 구체적인 요구를 파악하고자 하는 것에 의의가 있다. 분석결과, 세 개의 주 문제유형과 문제 유형 내 하위범주는 그룹1에 대해 2개, 그룹2에 대해 6개, 그룹3에 대해 2개로 구분되었다. 구체적으로 살펴보면, 물품파손과 신체 관련 피해의 경우가 빈번히 발생되는 문제이며, 하위범주 중 가장 심각한 복구 불가능한 서비스는 신체 피해로 나타났다. 고객의 감정측면에서는 적반하장의 태도에서 고객은 가장 분노하며, 원상태로의 복구가 불가능한 서비스 실패를 야기하였음에도 기업의 대응은 다양한 문제점을 보여주었다. 서비스 문제에 대한 고객행동과 기업평가에 관해서도 유형화하여 분석결과를 제시하였다. 본 연구의 결론에서는 연구결과 요약 및 시사점, 그리고 향후연구에 대한 제언을 하였다.

• 지식경영연구
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• 제11권3호
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• pp.59-76
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• 2010

The knowledge of customer in healthcare service industry is widely accepted as one of the key information for the customers' satisfaction. Previous studies on the customer knowledge about service recovery showed that service providers are having difficulties with standardizing interaction with customer, This study investigated the attribution according to the failure in providing medical services and customer's participation as preceding variable of attribution. A survey was carried out targeting an obesity clinic having high participating rate from May 10 to May 28, 2010. The research results revealed that from whom the responsibility of the service failure originated between the patients and the medical institutions depending on the extent of the patients involvement in service process.

• 산경연구논집
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• 제9권1호
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• pp.77-88
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• 2018

Purpose - Past research has not given much attention to the roles of consumers' social relationship type in the effects of justice type of service failure recovery alternatives on their satisfaction to the alternative exposed to them. Current research aimed at exploring the moderation role of consumers' social relationship central versus peripheral in the effects of justice types of service failure recovery alternatives on the recovery satisfaction, and this research also explored whether the level of satisfaction to interaction justice-focused alternative are significantly different between the two, their social relationship central and peripheral relationship. Research design, data, and methodology - 2(social relationship central versus peripheral) between-subjects design was employed. 50 participants for each experimental group there were. Participants of each group took forceful steps in choosing one between the procedural justice-focused alternative and the distribution justice-focused alternative. χ²-analysis was used to verify that the number of choosing each alternative becomes different between the two experimental groups, and a one way ANOVA was used to verify that the extent to which participants are satisfied to the alternative chosen by them becomes different between the two groups. Results - The number of participants choosing procedural justice-focused alternative at the group of social relationship central was larger than that at the group of social relationship peripheral, whereas the number of participants choosing distribution justice-focused alternative at the group of social relationship peripheral was larger than that at the group of social relationship central. And the level of satisfaction to procedural justice-focused alternative at the group of social relationship central was higher than that at the group of social relationship peripheral, whereas the level of satisfaction to distribution justice-focused alternative at the group of social relationship peripheral was higher than that at the group of social relationship central. In addition, the level of satisfaction to interaction justice-focused alternative was not significantly different between the two groups. Conclusions - Marketers should give attention to the type of justice when developing alternatives by which consumers' service failure can be recovered. They should suggest procedural justice-focused alternative to consumers under social relationship central, whereas they should develop distribution justice-focused alternative for consumers under social relationship peripheral. And in the process of recovering service failure they also should focus on interaction justice.

• Journal of Communications and Networks
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• 제16권5호
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• pp.534-547
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• 2014

Large-scale failures resulting from natural disasters or intentional attacks are now causing serious concerns for communication network infrastructure, as the impact of large-scale network connection disruptions may cause significant costs for service providers and subscribers. In this paper, we propose a new framework for the analysis and prevention of network service disruptions in large-scale failure scenarios. We build dynamic deterministic and probabilistic models to capture the impact of regional failures as they evolve with time. A probabilistic failure model is proposed based on wave energy behaviour. Then, we develop a novel approach for preventive protection of the network in such probabilistic large-scale failure scenarios. We show that our method significantly improves uninterrupted delivery of data in the network and reduces service disruption times in large-scale regional failure scenarios.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2016년도 춘계학술발표대회
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• pp.124-126
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• 2016

Successful deployment of the Software Defined Network (SDN) depends on its ability to cope up with network failures. There are various types of failures that may occur in an SDN. The most common are switch and link failures. It is necessary to recover the network from failures for a continuous service availability. But for the real-time services fast recovery from the failure is required to minimize the service disruption time. In the proposed work, we focused on minimizing the recovery time after the failure is detected. Once the failure is detected, the controller involvement is needed to dynamically reroute the failure disrupted flows from the failed component to an alternate path. The aim of the proposed scheme is to provide a traffic management scheme which can react to the dynamic network events by rapidly modifying the forwarding behavior of the switches for faster in-band network adaptability. The proposed scheme (1) Considers the shared data and control path delay (2) Optimally utilize the network resources (3) Eliminates the need of constant monitoring overhead at the controller which results into faster detouring and ultimately rapid recovery.

• 품질경영학회지
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• 제47권3호
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• pp.615-630
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• 2019

Purpose: Based on the theory of "Stimulus-Organism-Response" (S-O-R), this thesis takes customer forgiveness as a medium variable to explore the impact of merchant service remedy on customer behavior intention in the context of online shopping service failure. This thesis divides the merchant service remedy into two dimensions: spiritual recovery and material recovery, and reveals the influence difference of different merchant service remedy methods on customer behavior intention and the mediating role of customer forgiveness. Methods : 325 questionnaires were distributed and 307 valid questionnaires were collected for data analysis. The relationship between potential variables is proposed by using Structural Equations Modeling. Results : The two dimensions of service recovery have significant positive impact on customer forgiveness, and physical recovery has greater impact on customer forgiveness. In the influence of physical recovery on customer behavior intention, customer forgiveness is a partial mediating effect. However, in the influence of spiritual recovery on customer behavior intention, customer forgiveness is a complete mediating effect. Conclusion : In case of service faults, merchants should take the initiative to provide appropriate physical recovery and provide spiritual recovery sincerely and patiently. Only in this way can they regain good impression in the hearts of consumers and promote them to improve the quality of service recovery, so as to increase their willingness to repurchase Intention and positive word of mouth.

• The Journal of Asian Finance, Economics and Business
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• 제8권1호
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• pp.961-970
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• 2021

This study aims to examine the impact of service recovery in building customer loyalty through the mediating role of customer satisfaction and corporate image. This study also aims to examine the reciprocal relationship between customer satisfaction and corporate image in building customer loyalty. This study uses data from 126 consumers who have received recovery for a service failure in five logistics companies which operates in Southeast Sulawesi in Indonesia, namely; JNEs; J&T Express; Pandu Logistics; MEC; and TiKi. Data was collected using a questionnaire which was then distributed to all respondents via google form. The distribution of respondents at each logistics company provider was as follows: 19 respondents were customers of JNEs; 17 respondents were customers of J&T Express; 32 respondents were customers of Pandu Logistics; 21 respondents were customers of MEC; and 37 respondents were customers of TiKi's. The structural model developed in this study was tested using Partial Least Squared (PLS) method. The research found that service recovery has a direct effect on customer satisfaction and corporate image as positive and significant. Customer satisfaction and corporate image have a reciprocal relationship which then roles in building customer loyalty. Service recovery has an indirect effect on customer loyalty through the mediating role of customer satisfaction and corporate image.

• 한국정보통신학회논문지
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• 제13권12호
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• pp.2609-2617
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• 2009

본 논문은 저장장치 전용 네트워크인 SAN 상에서 운영되는 공유 파일 시스템 $SANique^{TM}$의 개괄적인 설계 방법과 공유 파일 시스템내의 오류노드탐지 및 회복 기법에 대한 방법을 설명한다. SAN 기반공유 파일 시스템의 특징 및 구조를 설명하고 $SANique^{TM}$의 구성요소와 개괄적 설계방법을 기술한다. 또한, 공유 파일 시스템에 참여하고 있는 컴퓨팅 노드의 오류로 인한 서비스 지연 또는 중지를 방지하기 위하여 오류 노드 탐지 및 회복기법을 설명한다. 대규모 컴퓨팅 노드로 구성된 공유 파일 시스템상에서 발생할 수 있는 오류의 종류를 나열하고, 오류로 인한 분할된 서브 그룹들 간의 오류 상황을 상호 탐지 할 수 있는 방법을 설명하고 이를 해결하기 위한 기법을 제안한다.

• 경영과정보연구
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• 제33권3호
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• pp.59-76
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• 2014

현재까지 국내에서 진행되어 온 서비스 실패와 회복 관련 연구들은 한국인의 정서적인 측면을 많이 고려하지 않았다. 한국인의 특성 상 이러한 감정적인 측면이 서비스 회복과정에서 작용할 수 있음에도 불구하고 대부분의 선행연구들은 기존에 해외문헌에서 주로 다루어진 변수들만으로 연구를 진행하였다. 그러나 실제 국내의 서비스 상황에서 발생하는 서비스 회복 과정에서는 소비자가 지각하는 정이라는 개념이 작용하는 경우가 많다. 이에, 관련 연구의 이해의 폭을 넓히고, 정이라는 개념을 실무에 적용하기 위해서는 추가적인 연구결과가 필요하다고 판단하였다. 따라서 본 연구에서는 기존연구의 한계점을 고려하여 서비스 회복상황에서 지각된 공정성과 고객이 지각하는 서비스제공자에 대한 정의 역할을 함께 살펴보았다. 이를 통해 국내 고객관점에서의 서비스 실패 상황에 적합한 서비스 회복모형에 대해서 고찰할 수 있는 계기를 마련하였다. 본 연구의 결과를 통해 단순히 서비스 회복 노력의 공정성뿐만 아니라 서비스 실패 후 회복과정에서 고객이 지각하는 정이라는 한국인 고유의 감정의 조절효과를 살펴봄으로써 고객의 이해심을 구할 수 있는 진심어린 회복노력의 중요성을 확인할 수 있다.