Developing an optimum maintenance policy by life cycle cost analysis – a case study

This paper focuses on developing maintenance policies for critical assets to improve the production performance based on life cycle cost (LCC) analysis. A general approach is adopted for conducting the LCC analysis. The investigation is based on a case study to demonstrate how an optimum maintenance policy is determined. The relevant LCC structure in the case study is defined for the decision process which involves determination of the optimum life, repair limit and selection of materials, and trade-off between repair and replacement. The LCC analysis is based on statistical data modelling which facilitates decision-making on the optimal replacement of an asset and its remaining life. Based on the optimization and remaining life criterion, the optimal maintenance policy can be made. The results obtained from this case study include selection of the best lining material for use, determination of the optimal time for refractory lining replacement, the hot repair sequence required for maintaining the optimum condition and the repair limit for doing cold repairs before replacement, for one type of electric arc furnaces used in the steel industry.     

The Training and Management of Qualified Maintenance Persons in Facing to the New Century

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A quantitative method for Failure Mode and Effects Analysis

Failure Mode and Effects Analysis (FMEA) is commonly used for designing maintenance routines by analysing potential failures, predicting their effect and facilitating preventive action. It is used to make decisions on operational and capital expenditure. The literature has reported that despite its popularity, the FMEA method lacks transparency, repeatability and the ability to continuously improve maintenance routines. In this paper an enhancement to the FMEA method is proposed, which enables the probability of asset failure to be expressed as a function of explanatory variables, such as age, operating conditions or process measurements. The probability of failure and an estimate of the total costs can be used to determine maintenance routines. The procedure facilitates continuous improvement as the dataset builds up. The proposed method is illustrated through two datasets on failures. The first was based on an operating company exploiting a major gas field in the Netherlands. The second was retrieved from the public record and covers degradation occurrences of nuclear power plants in the United States.     

广东省公路养护的工程管理政策研究

公路养护的工程管理相关法规文件是进行公路日常养护工作的主要法律依据和实施公路养护的行为规范。从公路养护工程的市场化运作、招投标以及监理3方面出发,通过深入分析及针对性的现场调研和函调,研究了目前广东省公路养护的工程管理中存在的突出问题及其主要原因,提出了完善广东省公路养护的工程管理的政策建议,可为公路养护及其管理提供参考。     

设备管理及维护信息系统的开发与应用

设备管理及维护信息系统是预防性设备维护的重要基础,对于机械制造企业提高设备管理水平和维护工作效率有重要意义。通过对企业实际情况的深入调查,分析了企业设备管理的信息需求及维护工作业务流程,开发了设备管理及其维护信息系统。该软件系统主要包括系统管理、设备维修资源管理、设备故障信息管理、维修工作管理、维修决策和维修数据分析六部分。该系统已在汽车零部件制造企业中实施。     

面向需求的工业维护管理模式研究

针对现有维护管理理论与方法中所存在的问题,提出了面向需求维护（ROM）的工业维护管理理论与方法体系.阐述了面向需求维护ROM的基本思想和概念,并分析了ROM的需求导向、多元目标、整体优化、综合运用的基本特征,探讨了面向需求维护ROM概念模型和ROM的技术体系与关键技术.     

高速导带式数码印花机故障模式、影响及危害度分析

导带式数码印花机发生故障,一方面影响企业生产进度,另一方面导致坯布打印失败而产生浪费,致使企业财产损失。为了降低机器故障率、减少财产损失,针对高速导带式数码印花机所有可能的故障,应用故障模式、影响及危害度分析（failure mode ,effects and criticality analysis ,FMECA）方法对其进行可靠性分析,找出了其薄弱环节为导带传送装置、喷墨打印装置、喷头清洗装置,得到了故障模式、影响及危害度分析表（FM ECA表）。并以此为基础,对危害度较大的故障模式给出了检修与日常维护建议,为企业制定高速导带式数码印花机的检修、保养策略提供依据,也为高速导带式数码印花机的可靠性设计提供基础,有利于提高其可靠性。     

A Methodology for Developing Maintenance Policy for Automated Manufacturing Plants

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Applying RCM in large scale systems: a case study with railway networks

In 2000, the European Union founded a project named ‘RAIL: Reliability centered maintenance approach for the infrastructure and logistics of railway operation’ aimed to study the application of Reliability centered maintenance (RCM) techniques to the railway infrastructure. In this paper, we present the results obtained into the RAIL project, including a RCM methodology adapted to large infrastructure networks and a RCM toolkit to perform the RCM analysis, including cost aspects and maintenance planning guidance. This paper addresses the problem of applying RCM to large scale railway infrastructure networks to achieve an efficient and effective maintenance concept. Railways use nowadays very traditional preventive maintenance (PM) techniques, relying mostly on ‘blind’ periodic inspection and the ‘know-how’ of maintenance staff. RCM was seen as a promising technique from the beginning of the RAIL project because of several factors. First, technical insights obtained were better than the existing, so that several maintenance processes could be revised and adjusted. Second, the interdisciplinary approach used to make the analysis was very enriching and very encouraging for maintenance staff consulted. Third, using the RCM structured approach allowed to achieve well-documented analysis and clear decision diagrams. Our methodology includes some new features to overcome the problems of RCM observed in other projects. As a whole, our methodology and Computerized Maintenance Management Systems have produced two short-term benefits: reduction of time and paperwork because databases and tools are accessible through Internet, and creation of a permanent, accurate, and better collection of information. It will also have some long-term benefits: better PM will increase equipment life and will help to reduce corrective maintenance costs; Production will increase as unscheduled downtime decreases; purchase costs of parts and materials will be reduced; more effective and up-to-date record of inventory/stores reports; and better knowledge of the systems to help the company to chose those systems with the best LCC. The results have been corroborated with the application of our methodology to signal equipment in several railway network sections, as shown in this paper. Because of the successful conclusion of the project, the Spanish railway company (RENFE) and the German railway company (DB A.G.), not only decided to adopt RCM to enhance PM, but they have started a large project to implement Total Preventive Maintenance relying on the implantation of the RCM methodology.     

Study on the Methods of Equipment Maintenance Management

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基于CDF和ACL模型的航空维修工作科目训练选择研究

训练科目选择是教学训练设计的首要环节,对后续的分析论证起着重要作用.本文运用美军标中危险困难频率模型(CDF)和所有关键知识模型(ACL)两种模型,采用定性和定量相结合的分析方法,对航空维修训练科目进行选择,给出了科目选择的评价因素,并利用AHP法确定了各因素权值.最后以某型飞机发动机的维修工作科目为例进行了实例分析.     

The impact of quality management orientation on maintenance performance

This paper aims to examine the relationship between quality management orientation dimensions and maintenance performance. The concept of quality management orientation is proposed and defined as a set of norms and values regarding customer orientation, quality responsibility, prevention and process orientation. Empirical data were drawn from a sample of Slovenian organisations in order to address the research question. The data were analysed using exploratory factor analysis, confirmatory factor analysis, correlation analysis and regression analysis. The findings indicate that quality management orientation is important predictor of maintenance performance. Data analysis results also show that quality management orientation dimensions are positively related to maintenance performance. By testing the impact of quality management orientation on maintenance performance, this study shows that strong foundation on quality management orientation is an effective way of improving maintenance performance.     

库存物资维护保养与封存包装方法

通过研究物资维护保养流程与方法、封存包装类型与主要形式,为仓库管理过程中实施保养和包装提供理论依据,保证物资良好的技术状况,延长物资储存时间。     

水力发电设备检修计划管理研究

分析了目前电厂检修计划管理中存在的问题,提出了一个全面的解决方案,并对方案中的核心部分进行了理论上的探讨.方案的目的在于改进检修计划管理的方式,减轻管理工作强度,提高工作效率,从而缩短检修工期和降低检修成本.     

计算机软件的日常管理及其维护策略分析

近年来,随着网络时代的不断发展,计算机已经成为人们生活、工作以及学习等重要的工具。当前,计算机的使用已经渗透到人们生活的各个领域当中,并对人们生活产生极大的影响。但是,人们在使用计算机的时候经常会发现,计算机由于各种原因会出现不同的故障,严重的影响到了人们的正常工作。为此,在使用计算机的过程中,一定要注意对计算机软件的日常管理与维护工作,确保计算机能够正常的工作,为我们的日常生活以及正常工作做贡献。