• Title/Summary/Keyword: maintenance

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Improving Maintenance Management Practices for Building Facility

  • Ismail, Zul-Atfi
    • Journal of Construction Engineering and Project Management
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    • v.4 no.3
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    • pp.21-32
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    • 2014
  • The practiced conventional methods for maintenance management in Malaysian Polytechnic faced many issues due to poor service delivery, inadequate finance, poor maintenance plan and maintenance backlogs. The purpose of this study is to improve the conventional method practices which tend to be ineffective in Malaysian Polytechnic. The case studies were conducted with eight Polytechnics and are selected based on conventional method practices and its major problems. There are around 32 Polytechnics in Malaysia and almost are using conventional methods. The number is considered very big indicating that the use of modern Information and Communication Technology (ICT) is still very limited compared to other institutions of higher learning in Malaysia. The overall findings of this research indicated; poor service delivery, inadequate financial, poor maintenance planning and maintenance backlogs. There is also need to overcome less man power competencies of maintenance management practices which existed with all eight Polytechnics. The proposed system is intended to be used for maintenance management practices at Malaysian Polytechnics in order to provide high-quality of building facility with safe and healthy environments.

C4I Maintenance Priority Decision using Maintenance Metric

  • Kim, Kiwang;Kang, Dongsu
    • Journal of the Korea Society of Computer and Information
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    • v.22 no.12
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    • pp.145-153
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    • 2017
  • Systemic management is required at each phase of the C4I system life cycle to achieve information advantage in the battlefield through stable operation of the C4I system under the NCOE. In particular, the maintenance phase is the longest period of the C4I system life cycle, and it is easy to utilize and analyze data such as faults that occur during system operation. However, according to the previous research, the maintenance is evaluated as a phase in which the definition and management of comprehensive indicators are insufficient compared to other phase. In this paper, we propose the method of C4I Maintenance Priority decision using Maintenance metric. As a result of modifying the Naval Tactical C4I System's preventive maintenance cycle according to the priority, the total number of faults is reduced and the maintenance efficiency is improved.

Study on Optimal LCC Considering Asset Management Through Maintenance-Period Analysis about Railway Truss Bridge (철도트러스 교량의 유지보수주기분석을 통한 자산관리 차원의 최적LCC에 관한 연구)

  • Kim, Tae-Hee;Park, Mi-Yun;Moon, Jae-Woo
    • Proceedings of the KSR Conference
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    • 2008.06a
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    • pp.1350-1358
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    • 2008
  • Recently the study related to life cycle cost analysis of railway structure consisted of a complex is proceeded covering several range, which is considering the methodology of efficiency and rationalization for maintenance and analysing long-time behavior of the structure of looking at standpoint from asset management and safety. But LCCA(life cycle cost analysis) of railway structure was almost impossible as there were not anything datum for maintenance plan, such as maintenance periods related to each of components(painting and corrosion of steel, and cracking of elements, etc)and maintenance proportion, despite of its 100-year history. According, for collecting data related to railway truss bridge, bridge record cards and testing safety papers, and researching question, etc are surveyed and classified for LCC Analysis. Especially, LCC assessment on the side of assets-maintenance considering about initial cost, maintenance cost, and indirect cost is constructed. Maintenance period and complementary measure rate are very important in maintenance. To decide maintenance period, Baysian updating method is applied.

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Cost Analysis Model for Periodic Maintenance Policy with Maintenance Cost Factor (보전비용요소를 고려한 정기보전정책의 비용분석모델)

  • 김재중;김원중
    • Journal of Korean Society of Industrial and Systems Engineering
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    • v.18 no.36
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    • pp.287-295
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    • 1995
  • This paper is concerned with cost analysis model in periodic maintenance policy. Generally periodic maintenance policy in which item is repaired periodic interval times. And in the article minimal repair is considered. Mimimal repair means that if a unit fails, unit is instantaneously restored to same hazard rate curve as before failure. In the paper periodic maintenance policy with minimal repair is as follows; Operating unit is periodically replaced in periodic maintenance time, if a failure occurs between minimal repair and periodic maintenance time, unit is replaced by a new item until tile periodic maintenance time comes. Also unit undergoes minimal repair at failures in minimal-repair-for-failure interval. Then total expected cost per unit time is calculated according to scale parameter of failure distribution. Maintenance cost factors are included operating, fixed, minimal repair, periodic maintenance and new item replacement cost. Numerical example is shown in which failure time of system has weibull distribution.

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A Process Improvement of Reverse Engineering and Delivery Steps for Service based Software Maintenance (서비스 기반 소프트웨어 유지보수를 위한 역공학과 인도 (Delivery)단계의 프로세스 개선)

  • Park, Jin-Ho;Rhew, Sung-Yul;Kim, Jong-Bae;Chung, Suk-Kyun
    • Journal of Information Technology Services
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    • v.9 no.4
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    • pp.169-185
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    • 2010
  • According to software growth, also software maintenance has been continuously improving. In addition, the existing concept of software maintenance process demands operational management and improvement of service task. However, when we perform maintenance task, we have several constraints about applying service based requirement to system. Therefore, in order to solve these problems, we need a study of task of process for service based maintenance. In this paper, we propose a Service based Software Maintenance Process. Proposed process based on MaRMI-RE standard for software development and maintenance and compares it with the service based representative standards. In a related works, we study activity of ITIL and identify activities and tasks for maintenance. After this, identified activities and tasks compare with activities of MaRMI-RE. And then, we derive activities and tasks of a Service based Software Maintenance Process. Finally, we validate a result by comparing the proposed process with a general service operational process.

Deciding the Maintenance Priority of Power Distribution System using Time-varying Failure Rate (시변 고장률을 이용한 배전계통 유지보수 우선순위 결정)

  • Lee, Hee-Tae;Moon, Jong-Fil;Kim, Jae-Chul
    • The Transactions of the Korean Institute of Electrical Engineers A
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    • v.55 no.11
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    • pp.476-484
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    • 2006
  • The failure prediction and preventive maintenance for the equipment of nuclear power plant area using reliability-centered maintenance have been grown. On the other hand, the maintenance for power distribution system consists of time-based maintenance mainly. In this paper, the new maintenance algorithms for power distribution system are developed considering reliability indices. First of all, Time-varying failure rates are extracted from data accumulated at KEPCO using exponential distribution function and weibull distribution function. Next, based on the extracted failure rate, reliability for real power distribution system is evaluated for applying the effective maintenance algorithm which is the analytic method deciding the maintenance point of time and searching the feeder affecting the specific customer. Also the algorithm deciding the maintenance priority order are presented based on sensitivity analysis and equipment investment plan are analyzed through the presented algorithm at real power distribution system.

Maintenance-based prognostics of nuclear plant equipment for long-term operation

  • Welz, Zachary;Coble, Jamie;Upadhyaya, Belle;Hines, Wes
    • Nuclear Engineering and Technology
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    • v.49 no.5
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    • pp.914-919
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    • 2017
  • While industry understands the importance of keeping equipment operational and well maintained, the importance of tracking maintenance information in reliability models is often overlooked. Prognostic models can be used to predict the failure times of critical equipment, but more often than not, these models assume that all maintenance actions are the same or do not consider maintenance at all. This study investigates the influence of integrating maintenance information on prognostic model prediction accuracy. By incorporating maintenance information to develop maintenance-dependent prognostic models, prediction accuracy was improved by more than 40% compared with traditional maintenance-independent models. This study acts as a proof of concept, showing the importance of utilizing maintenance information in modern prognostics for industrial equipment.

A Study on the Optimal Allocation of Maintenance Personnel in the Military Emergency Maintenance System Considering the Property of Impatience (Impatience 특성을 고려한 군 긴급정비시스템 정비인력 최적할당 연구)

  • Kim, Sungwoo
    • Journal of the Korea Institute of Military Science and Technology
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    • v.24 no.4
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    • pp.449-456
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    • 2021
  • Impatience characteristics are an important factor to be considered in the defense field, which is sensitive to time, but there are not many cases applied. In addition, due to the difficulty of analysis that must consider various probabilistic factors (breakdown/maintenance distribution, impatience characteristics, etc.), military decision makers consider only simple data (number of occurrences per year, maintenance time, etc.) Therefore, in this study, a model capable of analyzing the performance of the emergency maintenance system for determining the appropriate size and organization of military and civilian maintenance personnel was presented in consideration of impatience characteristics and probabilistic factors. And through numerical analysis, the appropriate size of the military and civilian emergency maintenance teams was analyzed. This study is significant in that it can improve readiness of operational power and prevent waste of defense budget through efficient operation of the military's emergency maintenance system.

BASIC RESEARCH FOR BUILDING EDUCATIONAL FACILITY MAINTENANCE PROCESS - FOCUSING ON DAEJEON METROPOLITAN CITY -

  • Jung-Whan Oh;Chun-Kyong Lee ;Mi-Hye Lee ;Tae-Keun Park
    • International conference on construction engineering and project management
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    • 2005.10a
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    • pp.1203-1207
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    • 2005
  • At this point of time that it is required to improve educational environment and the function of educational facilities as well as interests on educational facility business is increasing, it is actual situation that unsystematic maintenance of educational facility is not being able to cope with the change caused by introducing the 7th curriculum. Also, in spite of enormous career in maintenance work, the function is not properly performed because of unsystematic management. In case of educational facility manager, he parallels performing general administrative work and facilities maintenance work not as a maintenance expert but as a member of administration office. So there are difficulties in performing maintenance work, and systematic maintenance work cannot be expected because of lacking maintenance manual. Therefore, in this research, I would like to investigate and analyze the status of educational facilities and to elicit the point of issue as a basic research to save maintenance expenses and to make pleasant educational environment.

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MAINTENANCE PERFORMANCE EVALUATION OF THE BUILDINGS IN THE DESIGN PHASE

  • Hakyu Baeck;Chansik Lee
    • International conference on construction engineering and project management
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    • 2005.10a
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    • pp.1138-1143
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    • 2005
  • As the importance of building maintenance is being emphasized, studies regarding the efficient building maintenance focus on the evaluation of the maintenance plan, implementation and its cost only while the evaluation of the maintenance performance is nearly ignored. At this point when the importance is placed on the performance design we need to have methods to improve maintenance performance of the buildings in Design Phase. The purpose of this study was to set the design evaluation items to improve the maintenance performance of the buildings. Through the review of the existing literature, we set the concept of the maintenance performance and suggested evaluation items to evaluate the maintenance performance through the analysis of domestic and overseas certification and design guidelines.

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