• Journal of Information Technology Applications and Management
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• 제29권6호
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• pp.63-80
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• 2022

In this paper, we study structural changes and performance gains in condition-based maintenance process redesign when mobile IoT technology is embedded into urban railway rolling stock. We first develop condition-based maintenance To-Be process model in accordance with the IoT deployment scheme. Secondly, we draw upon theoretical framework of redesign process analysis to develop performance evaluation method suitable to predictive maintenance shift from As-Is ordinary maintenance practice. Subsequently, To-Be process performance evaluations are conducted adopting both the quantitative and qualitative method for time, cost, and dependability dimensions. The results ascertain the considerable benefits captured through detection abnormality prior to actual rolling stock failure occurrence, and details of performance improvements and enhancement of standardization level is revealed. The procedures and results presented in this paper offers useful insights in the fields of IoT economic analysis, condition based maintenance, and business process redesign.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2004년도 춘계학술대회
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• pp.2059-2063
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• 2004

Most power plants have operated many independent computerize systems for maintenance. Independence of systems have caused complexity of business process and inconvenience of computer system management. Because the equipment and material master data is not standardize and structurize, it is difficult to manage equipment maintenance history and material delivery. Especially equipment classification criterion is important for standardization of every maintenance information. It is necessary to integrate function of independent systems for business process simplification and rapid work flow. this paper provides equipment classification criterion design and system integration method with the case of live system development.

• 대한산업공학회지
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• 제39권6호
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• pp.599-608
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• 2013

This study is intended to propose optimal maintenance organization to process industry, especially paper industry by analyzing maintenance organization of paper industry and finding out how the maintenance organization and the allocation of maintenance resources influence maintenance performance indices here in this paper. In this study, we analyzed the maintenance organization in detail and studied correlation between maintenance organization and equipment failure rate for the major top six domestic paper-mills in market share. According to the study, the maintenance organization has been changed in accordance with its business environment, but its performance was different by both the allocation way of maintenance resources and the structure of maintenance organization. For paper industry, whose availability is the most important key index that determines the success or failure of a business, it turns out to be the most effective strategy that operates the combination maintenance combined central maintenance with area maintenance and allocates the maintenance resources mainly for preventive maintenance. In particular, it turned out to be that there is the strong positive correlation between the rate of shift workers and the equipment failure rate. The results of this study is not limited to paper industry, but expandable to other industry. So it is expected that the direction of the maintenance organization would be given to the company which is struggling to improve its availability.

• 한국건설관리학회:학술대회논문집
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• 한국건설관리학회 2007년도 정기학술발표대회 논문집
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• pp.312-315
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• 2007

본 연구는 공공시설과 교육시설을 대상으로 시설관리자의 효율적인 유지관리 업무수행과 유지관리 주체 간의 원활한 정보교환을 위한 웹기반 건축물 유지관리 이력정보관리 시스템 개발을 목적으로 한다. 시설 노후화와 성능판단의 근거로 활용할 수 있는 유지관리 이력정보 관리과정상 발생하는 문제점을 인식하고 각 시설의 시설관리 담당자 면담조사를 통하여 시설별 유지관리 이력관리 현황을 분석하여 이를 근거로 통합 유지관리 업무프로세스를 도출하였다. 또한 시설관리 전문가 집단의 요구사항을 수렴하여 공공시설과 교육시설의 특성을 반영한 유지관리 업무 수행 효율화를 극대화와 현장실무적용, 유지관리 이력DB의 활용을 유도할 수 있는 건축물 유지관리 이력정보관리 시스템을 제안한다.

• 산업경영시스템학회지
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• 제46권3호
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• pp.148-160
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• 2023

The air transport industry is experiencing unprecedented fluctuations in aviation demand through the Covid-19 pandemic, and is more focused than ever on maintaining and generating business profitability. During the pandemic, demand for air cargo has soared, and the conversion business from passenger aircrafts to freighters(P2F) is drawing attention as a new business in the aviation maintenance industry. This study derives important factors to be considered in order to successfully carry out the P2F project through a wide range of cases and related literature, and analyzes the relative importance of each factor using the analytic hierarchy process. Through a survey of 33 aviation maintenance experts with more than 20 years of field experience, the importance of main factors and their sub factors was determined and implications were drawn. As a primary result, in order to succeed in the P2F project, the main factors were identified in the order of skill, finance, and location. The most important sub factors for each main factors were identified in order of securing airframe modification skill, securing infrastructure construction cost, and creating P2F business complex and district. The quantified success factors suggested the critical direction for the successful development of Korea's P2F business, and presented viable and specific business strategies and implementation plans for each factors.

• 유통과학연구
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• 제18권1호
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• pp.59-69
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• 2020

Purpose: This study aims to examine such relationships as the experiential value that customers respond to with regard to maintenance service by empirically revealing how the quality of auto maintenance and repair service affects both customer satisfaction and intention to reuse the same service through the Perceived-experiential Value of customers. Research design, data and methodology: The research model was designed with service qualities such as human quality, material quality, interaction quality, and system quality as independent variables, perceived-experiential value as a parameter, and service satisfaction and return visit intention as dependent variables. Through a questionnaire composed of 24 items, a total of 319 survey data from customers with the experience of using car maintenance service centers in Korea were collected and analyzed using a structural equation. Results: The material quality did not affect the customers' perceived-experiential value, whereas the interaction quality had the greatest influence. It is confirmed that human quality, interaction quality, and system quality can generate customer satisfaction and repurchase intention through the perceived-experiential value. Conclusions: The experiential value of customers can play an important medium role in improving satisfaction, with customers considering interaction quality important. Therefore, the auto maintenance and repair service should consider relationship-focused service strategies.

• 지적과 국토정보
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• 제47권1호
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• pp.237-250
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• 2017

본 연구는 의왕시 부동산행정정보일원화 사업과 관련하여 지적공부(도면, 대장)등록사항의 정비를 자료정비 사업에 의하여 정비하였던 것에 착안하고 있다. 여기에서 나타난 사례를 통해 향후 지적공부 확산정비 모델과 함께 부동산행정정보일원화 사업에 고품질의 데이터 제공과 자료정비 사업의 효율성 제고를 연구의 궁극적 목적으로 하고 있다. 본 연구에서는 지적공부 자료정비 사업을 통한 성과와 제도적, 시간적, 비용적인 측면의 효율성 부분을 근거로 제시하여 자료정비 사업의 효과를 나타낼 수 있었으며, 사업대상 지역 현황과 오류 유형의 정의, 대상지역 오류 현황 등을 분석하고 여기에서 나타난 오류를 유형화하여 이에 대한 정비방안과 정비성과를 도출하였다.

• 자동차안전학회지
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• 제13권3호
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• pp.26-31
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• 2021

Although the number of domestic electric vehicle registrations exceeded 100,000 in the first half of 2020, legal and institutional concerns for maintenance and management are insufficient. In particular, the existing automobile maintenance business and qualification holders are not prohibited from performing electric vehicle maintenance without additional qualifications or training under the current laws. In this study, we review the current status of Korean laws and regulations, examine discussions abroad such as the UK, the US, and Germany, and then discuss desirable laws and institutional reform. This study proposes to temporarily reorganize the system in a way that separates the electric vehicle maintenance business and the electric vehicle maintenance qualifications from conventional vehicle.

• 한국지진공학회논문집
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• 제18권6호
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• pp.271-278
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• 2014

Seismic intensity deduced from instrumental data has been evaluated using the empirical relationship between intensity and peak ground acceleration (PGA) during an earthquake. The Japan Meteorological Agency (JMA) developed a seismic intensity meter, which can estimate the real-time seismic intensity from seismic motions observed at a local site to evaluate the damage during the earthquake more correctly. This paper proposes a practical application of the JMA intensity to dams during the 2013 earthquake in Yeongcheon, Korea. In the present paper, seismic intensity was estimated from the relationships between accelerations observed at Yeongcheon Dam. Estimated seismic intensities were in the range of 0 to 3, which was verified from the displacements of dams and the variation of the ground water level observed at Yeongcheon dam during the earthquake. The JMA intensity, which is determined by considering the frequency, duration of cyclic loading, etc., was 0 (zero) and there was no damage to Yeoncheon dam during the earthquake.

• Industrial Engineering and Management Systems
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• 제15권4호
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• pp.403-431
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• 2016

The objective of this study is to integrate the business, maintenance and production processes of a manufacturing system by incorporating errors. First, the required functions are estimated according to the historical data. The system activities are simulated by Visual SLAM software and the required outputs are obtained. Several outputs including lead times in different dimensions, total cost and production rates are computed through simulation. Finally, data envelopment analysis (DEA) is utilized in order to select the best option between the defined scenarios due to the multi-criteria feature of the problem. This is the first study in which the lead times, cost and production rates are simultaneously considered in the integrated system imposed of business, maintenance and production processes by incorporating errors. In the current study, the major bottlenecks of the system being studied are identified and suggested different strategies to improve the system and make the best decision.