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  Subjects -> ENGINEERING (Total: 2160 journals)
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ENGINEERING (1165 journals)            First | 3 4 5 6 7 8 9 10 | Last

ISA Transactions     Full-text available via subscription   (Followers: 1)
IT Professional     Full-text available via subscription   (Followers: 3)
Johnson Matthey Technology Review     Open Access   (Followers: 2)
Journal of Advanced Manufacturing Systems     Hybrid Journal   (Followers: 5)
Journal of Aerosol Science     Hybrid Journal   (Followers: 1)
Journal of Aerospace Engineering     Full-text available via subscription   (Followers: 47)
Journal of Alloys and Compounds     Hybrid Journal   (Followers: 7)
Journal of Analytical and Applied Pyrolysis     Hybrid Journal   (Followers: 3)
Journal of Analytical Science & Technology     Open Access   (Followers: 5)
Journal of Analytical Sciences, Methods and Instrumentation     Open Access   (Followers: 1)
Journal of Applied Analysis     Hybrid Journal  
Journal of Applied and Industrial Sciences     Open Access  
Journal of Applied Logic     Full-text available via subscription  
Journal of Applied Physics     Hybrid Journal   (Followers: 76)
Journal of Applied Probability     Full-text available via subscription   (Followers: 6)
Journal of Applied Research and Technology     Open Access  
Journal of Applied Science and Technology     Full-text available via subscription  
Journal of Applied Sciences     Open Access   (Followers: 5)
Journal of Architectural Engineering     Full-text available via subscription   (Followers: 6)
Journal of ASTM International     Full-text available via subscription   (Followers: 3)
Journal of Automation and Control     Open Access   (Followers: 1)
Journal of Aviation Technology and Engineering     Open Access   (Followers: 6)
Journal of Biological Dynamics     Open Access   (Followers: 1)
Journal of Biomedical Science     Open Access   (Followers: 3)
Journal of Biomolecular NMR     Hybrid Journal   (Followers: 4)
Journal of Biosciences     Open Access  
Journal of Catalysis     Hybrid Journal   (Followers: 6)
Journal of Catalyst & Catalysis     Full-text available via subscription  
Journal of Central South University     Hybrid Journal   (Followers: 1)
Journal of China Coal Society     Open Access  
Journal of China Universities of Posts and Telecommunications     Full-text available via subscription   (Followers: 2)
Journal of China University of Mining and Technology     Full-text available via subscription  
Journal of Cleaner Production     Hybrid Journal   (Followers: 16)
Journal of Coal Science and Engineering (China)     Hybrid Journal  
Journal of Cold Regions Engineering     Full-text available via subscription   (Followers: 3)
Journal of Combinatorial Designs     Hybrid Journal   (Followers: 3)
Journal of Combustion     Open Access   (Followers: 6)
Journal of Communications     Open Access   (Followers: 19)
Journal of Complex Systems     Open Access   (Followers: 1)
Journal of Computational and Nonlinear Dynamics     Full-text available via subscription   (Followers: 5)
Journal of Computational and Theoretical Nanoscience     Full-text available via subscription  
Journal of Computational Biology     Hybrid Journal   (Followers: 6)
Journal of Computational Design and Engineering     Open Access  
Journal of Computational Electronics     Hybrid Journal   (Followers: 4)
Journal of Computational Engineering     Open Access  
Journal of Computing and Information Science in Engineering     Full-text available via subscription   (Followers: 2)
Journal of Coupled Systems and Multiscale Dynamics     Full-text available via subscription  
Journal of Dairy Science     Hybrid Journal   (Followers: 15)
Journal of Display Technology     Hybrid Journal   (Followers: 2)
Journal of Dynamic Systems, Measurement, and Control     Full-text available via subscription   (Followers: 12)
Journal of Dynamical and Control Systems     Hybrid Journal   (Followers: 3)
Journal of Earthquake Engineering     Hybrid Journal   (Followers: 8)
Journal of Elasticity     Hybrid Journal   (Followers: 2)
Journal of Electroceramics     Hybrid Journal  
Journal of Electromagnetic Waves and Applications     Hybrid Journal   (Followers: 3)
Journal of Electronic Imaging     Partially Free   (Followers: 2)
Journal of Electronic Testing     Hybrid Journal   (Followers: 1)
Journal of Electronics Cooling and Thermal Control     Open Access   (Followers: 2)
Journal of Electrostatics     Hybrid Journal   (Followers: 1)
Journal of Energy Engineering     Full-text available via subscription   (Followers: 8)
Journal of Energy Resources Technology     Full-text available via subscription   (Followers: 6)
Journal of Engineering     Open Access  
Journal of Engineering and Computer Innovations     Open Access  
Journal of Engineering and Technology     Open Access   (Followers: 5)
Journal of Engineering and Technology Research     Open Access  
Journal of Engineering Design     Hybrid Journal   (Followers: 16)
Journal of Engineering Education     Hybrid Journal   (Followers: 1)
Journal of Engineering Entrepreneurship, The     Full-text available via subscription   (Followers: 3)
Journal of Engineering for Gas Turbines and Power     Full-text available via subscription   (Followers: 12)
Journal of Engineering Mathematics     Hybrid Journal  
Journal of Engineering Mechanics     Full-text available via subscription   (Followers: 12)
Journal of Engineering Physics and Thermophysics     Hybrid Journal  
Journal of Engineering Thermophysics     Hybrid Journal  
Journal of Engineering, Computers and Applied Sciences     Open Access  
Journal of Engineering, Design and Technology     Hybrid Journal   (Followers: 16)
Journal of Environmental & Engineering Geophysics     Full-text available via subscription  
Journal of Environmental Engineering     Full-text available via subscription   (Followers: 29)
Journal of Environmental Engineering and Landscape Management     Hybrid Journal   (Followers: 7)
Journal of Experimental Nanoscience     Hybrid Journal   (Followers: 2)
Journal of Fire Sciences     Hybrid Journal   (Followers: 3)
Journal of Flood Risk Management     Hybrid Journal   (Followers: 7)
Journal of Fluids Engineering     Full-text available via subscription   (Followers: 17)
Journal of Fourier Analysis and Applications     Hybrid Journal  
Journal of Fuel Cell Science and Technology     Full-text available via subscription   (Followers: 2)
Journal of Functional Analysis     Full-text available via subscription   (Followers: 1)
Journal of Fundamental and Applied Sciences     Open Access  
Journal of Geological Research     Open Access   (Followers: 1)
Journal of Geotechnical and Geoenvironmental Engineering     Full-text available via subscription   (Followers: 18)
Journal of Global Optimization     Hybrid Journal   (Followers: 4)
Journal of Green Science and Technology     Full-text available via subscription  
Journal of Guidance, Control, and Dynamics     Full-text available via subscription   (Followers: 79)
Journal of Healthcare Engineering     Full-text available via subscription   (Followers: 2)
Journal of Heat Transfer     Full-text available via subscription   (Followers: 30)
Journal of Humanitarian Engineering     Open Access   (Followers: 1)
Journal of Hydraulic Engineering     Full-text available via subscription   (Followers: 15)
Journal of Hyperspectral Remote Sensing     Open Access   (Followers: 1)
Journal of Imaging     Open Access  
Journal of Imaging Science and Technology     Full-text available via subscription  
Journal of Industrial and Production Engineering     Hybrid Journal   (Followers: 3)
Journal of Industrial Engineering and Management     Open Access   (Followers: 4)

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Journal Cover   Journal of Quality in Maintenance Engineering
  [SJR: 0.851]   [H-I: 29]   [4 followers]  Follow
    
   Hybrid Journal Hybrid journal (It can contain Open Access articles)
   ISSN (Print) 1355-2511
   Published by Emerald Homepage  [311 journals]
  • An evaluation of transfusion of TQM-TPM implementation initiative in an
           Indian manufacturing industry
    • Authors: Kanwarpreet Singh, Inderpreet Singh Ahuja
      First page: 134
      Abstract: Journal of Quality in Maintenance Engineering, Volume 21, Issue 2, May 2015.
      Purpose The objectives of the study includes investigations of current status of TQM and TPM implementation initiatives as well as benefits attained through synergetic TQM-TPM implementation in the manufacturing organization to assess roadmap followed by Indian manufacturing entrepreneur towards affecting manufacturing performance enhancements. Design/methodology/approach The study has been carried out in the large scale manufacturing organization in the country that have implemented or are in the process of implementing TPM alone and TQM-TPM both. The study emphasizes upon comparing of business performance enhancements accrued through these quality improvement approaches. Findings The study revealed that Transfusion of TQM-TPM initiatives can significantly contribute towards the better improvement of manufacturing performance in the organisation, rather than TPM alone initiatives, also leading towards realization of core competencies for meeting global challenges. Research limitations/implications The study is conducted to develop an understanding of contributions of TQM and TPM initiatives in Indian manufacturing industry. The present study endeavors to investigate the effect of an aggressive TQM-TPM implementation plan for strategically meeting global challenges and competition. Originality/value The study highlights the contributions made by holistic TQM-TPM implementation in an Indian manufacturing enterprise.
      Citation: Journal of Quality in Maintenance Engineering
      PubDate: Tue, 24 Mar 2015 00:44:03 GMT
      DOI: 10.1108/JQME-04-2013-0017
       
  • Managing storeroom operations using cluster-based preventative maintenance
    • Authors: Abdelhakim Abdelhadi, Layth Alwan, Xiaohang Yue
      First page: 154
      Abstract: Journal of Quality in Maintenance Engineering, Volume 21, Issue 2, May 2015.
      Purpose The impact on the cost of materials used to conduct preventive maintenance is investigated. The main motivation for this work is to demonstrate how the group technology concept can be used to improve preventive maintenance operations. In assessing improvement, the impact on the cost of materials used to conduct preventive maintenance is investigated. Design/methodology/approach Based on the similarities between machines required maintenance and failure types, machines are grouped together into virtual cells using similarity coefficients. These cells, then, are used to come up with more efficient planning and scheduling procedures to conduct preventive maintenance operations including inventory of parts and the execution of maintenance operations. Findings The results demonstrated that the proposed preventive maintenance approach could provide a significant cost savings over a traditional PM program, especially in industries for which there is considerable material cost for the performance of PM. Originality/value The results presented in this paper are reliable, objective, and may be expanded by using the same concept of developing virtual cells to group other types manufacturing operations.
      Citation: Journal of Quality in Maintenance Engineering
      PubDate: Tue, 24 Mar 2015 00:43:53 GMT
      DOI: 10.1108/JQME-10-2013-0066
       
  • A nearly optimal inspection policy for a two-component series system
    • Authors: Ghofrane Maaroufi, Anis Chelbi, Nidhal Rezg, Ait-Kadi Daoud
      First page: 171
      Abstract: Journal of Quality in Maintenance Engineering, Volume 21, Issue 2, May 2015.
      Purpose The purpose of this paper is to determine a nearly optimal inspection sequence for a series system consisting of two components subject to gradual deterioration and whose failures are not self-announcing and can be detected only through inspection. Design/methodology/approach The problem is tackled in the context of condition based maintenance with a maintenance model in the class of the control-limit policies for which the maintenance decision is made following inspection by comparison of the deterioration level to critical thresholds. A mathematical model is developed to express the total expected cost per time unit as a function of the inspection instants. Findings For any given series system composed of two components with known critical deterioration threshold levels, and for any given set of costs related to inspection, inactivity due to failure, and preventive and corrective replacements of each component, a nearly optimal inspection sequence of the system is derived such as the total expected cost is reduced. Research limitations/implications Due to the complexity of the cost model with the inspection instants (x1, x2, x3, ….) being the decision variables, it has not been possible to derive the optimal solution. A quasi-optimal sequence of inspection times is derived along with the corresponding total average cost per time unit. Practical implications In many practical situations in which condition based maintenance is implemented, a tradeoff between inspection costs and inactivity and replacement costs has to be balanced when determining the intervals between successive inspections at which the degradation level of the components should be assessed and compared to predetermined critical threshold levels. Inspecting too often would increase inspection costs but in the same time it would also increase the probability to avoid a failure and end up with a preventive replacement, whereas not inspecting often enough would increase the probability to end up with a failure increasing replacement and inactivity costs. Originality/value While the inspection problem has been largely treated for single component systems, inspection policies become much more complex when considering multi-component systems. A two component series system is considered in this paper.
      Citation: Journal of Quality in Maintenance Engineering
      PubDate: Tue, 24 Mar 2015 00:44:05 GMT
      DOI: 10.1108/JQME-11-2013-0074
       
  • Research study from industry-university collaboration on ‘no fault
           found’ events
    • Authors: Samir Khan
      First page: 186
      Abstract: Journal of Quality in Maintenance Engineering, Volume 21, Issue 2, May 2015.
      Purpose The purpose of this article is to present the successes and barriers from an industry-university partnership on studying the impact of No Fault Found (NFF) events. As a consequence, various opportunities are explored to engage with industry to investigate the problem. A comprehensive training is also outlined to ensure that experience and troubleshooting techniques can be disseminated as guidelines across businesses. Design/methodology/approach The study was performed by Cranfield University in collaboration with industrial partners on identifying the impact of the No Fault Found (NFF) problem within engineering services. This includes discussions with maintenance engineers, outcomes from a symposium organized specifically on NFF and the authors' own experiences with the issue. Findings The paper discusses the continuing serious problem with NFF events found at various maintenance echelons, and suggests a need for formal postgraduate training to be taught within the field of maintenance management. This includes not just technical issues, but also encompassing organizational structures, cultures and behaviours. Since focusing only on one issue at a time does not suffice in dealing with the NFF problem, an integrated approach is required for modern maintenance services and operations. Research limitations/implications Higher education learning outcomes have been outlined for competent engineering personnel, to broaden their understanding on the subject area. This is based on discussions with industrial collaborators and recently published material. Practical implications This paper emphasizes the importance of the breath of interaction channels and demonstrates the opportunities for effective knowledge exchange by using the activities at Cranfield University to demonstrate their usefulness. The arguments clearly lead to the necessity of academia in this type of industrial problem. However, the presence of a university in this case is not as the sole problem solver, but the rather to act as a collaborative medium between various other outlets. Further ideas proposed, such as constructing guidelines for industries in handling NFF problems and benchmarking tools, can serve as real products that can be benefit industries. The study also aims to promote best practice in the field of maintenance management and outlines the foundations for NFF training material. Originality/value The originality of the paper is that it presents a structured methodology for engaging with industry. It also outlines a curriculum for NFF training. It essentially serves as a road-map for research and offers a detailed account of areas that need to be taken into account in order to reduce the likely event of NFF.
      Citation: Journal of Quality in Maintenance Engineering
      PubDate: Tue, 24 Mar 2015 00:44:00 GMT
      DOI: 10.1108/JQME-01-2014-0004
       
  • Model for economic replacement time of mining production rigs including
           redundant rig costs
    • Authors: Hussan Saed Al-Chalabi, Jan Lundberg, Majid Al-Gburi, Alireza Ahmadi, Behzad Ghodrati
      First page: 207
      Abstract: Journal of Quality in Maintenance Engineering, Volume 21, Issue 2, May 2015.
      Purpose This paper presents a practical model to determine the economic replacement time (ERT) of production machines. The objective is to minimise the total cost of capital equipment, where total cost includes acquisition, operating, maintenance costs and costs related to the machine’s downtime. The costs related to the machine’s downtime are represented by the costs of using a redundant machine. Design/methodology/approach Four years of cost data are collected. Data is analysed, practical optimisation model is developed and regression analysis is done to estimate the drilling rigs ERT. The artificial neural network (ANN) technique is used to identify the effect of factors influencing the ERT of the drilling rigs. Findings The results show that the redundant rig cost has the largest impact on ERT, followed by acquisition, maintenance and operating costs. The study also finds that increasing redundant costs per hour have a negative effect on ERT, while decreases in other costs have a positive effect. Regression analysis shows a linear relationship between the cost factors and ERT. Practical implications The proposed approach can be used by the decision maker in determining the economic replacement time of production machines which used in mining industry. Originality/value The research proposed in this paper provides and develops an optimisation model for economic replacement time of mining machines. This research also identifies and explains the factors that have the largest impact on the production machine’s ERT. This model for estimating the ERT has never been studied on mining drilling rigs.
      Citation: Journal of Quality in Maintenance Engineering
      PubDate: Tue, 24 Mar 2015 00:44:02 GMT
      DOI: 10.1108/JQME-07-2014-0041
       
  • Mechanization of static mechanical systems inspection planning process:
           the state of the art
    • Authors: R.M. Chandima Ratnayake
      First page: 227
      Abstract: Journal of Quality in Maintenance Engineering, Volume 21, Issue 2, May 2015.
      Purpose The purpose of this paper is to review the evolution of inspection and maintenance (I&M) practices used for aging and newly built oil and gas (O&G) facilities. It also proposes a framework and an approach for mechanizing inspection planning to perform preventive maintenance (PM) activities, taking technical condition (TC) and relative degradation (RD) into consideration. Design/methodology/approach The paper systematically collects, categorizes, and analyzes the published literature of both researchers and practitioners. It also utilizes industrial experience that has been accrued and utilized from inspection planning practices for static mechanical equipment on aging O&G production plants. Findings The paper defines significant issues in I&M of O&G assets related to: different philosophies; stakeholders’ requirements trade-off; dependability and asset deterioration challenges; items interacting with inspection planning mechanization processes and I&M optimization approaches. A framework is identified to mechanize the inspection planning process in order to reduce the effect arising from human involvement, whilst improving the effective utilization of data from different sources. The suggested approach improves the quality of an inspection program, whilst minimizing the variability and cost to the engineering contractors as well as to the owners of O&G facilities. Practical implications The mechanization of inspection planning (MIP) is vital to have inspection programs with uniform quality. The currently employed inspection practices face challenges in maintaining uniform quality from one inspection program to another due to the variability present in the planning process, especially among the different inspection planning engineers. The suggested fuzzy logic based MIP supports the minimization of the variability and increases the quality of inspection programs. Originality/value The paper provides a comprehensive review of research contributions and industrial development efforts. These will be useful to the life cycle stakeholders in both academia and industry in understanding the inspection planning problem and solution space within the O&G asset inspection and maintenance context.
      Citation: Journal of Quality in Maintenance Engineering
      PubDate: Tue, 24 Mar 2015 00:44:04 GMT
      DOI: 10.1108/JQME-09-2012-0033
       
  • Performance measurement and management for maintenance: a literature
           review
    • Authors: Aditya Parida, Uday Kumar, Diego Galar, Christer Stenström
      Pages: 2 - 33
      Abstract: Journal of Quality in Maintenance Engineering, Volume 21, Issue 1, Page 2-33, March 2015.
      Purpose – The purpose of this paper is to provide a literature review of the performance measurement (PM) in maintenance. The authors aim to discuss the background and development of the PM for maintenance, besides defining the concept of performance measures for maintenance and the frameworks developed. Design/methodology/approach – A detailed and extensive literature search and study was undertaken by the authors on the concept and definition of PM, performance indicators (PIs), maintenance performance indicators and various performance frameworks. The history and theory of PM over different phases of business and technological developments have been critically examined and analysed in this review paper. Findings – This paper reviews and presents the different PIs and PM frameworks like; balanced scorecard (BSC), performance prism, performance pyramid and performance matrix, etc., and identifies their characteristics and shortcomings. After considering related issues and challenges, frameworks and approaches for the maintenance performance measurement (MPM) are also presented, where the emerging techniques like; emaintenance have also been discussed amongst others. More and more industries are applying the balanced and integrated MPM frameworks for their competitive survivability and sustainability. Practical implications – The concept, issues and approaches considered for the MPM frameworks can be adapted by the practicing managers, while trying to define and develop an MPM framework for the operation and maintenance activities. The considerations of the advantages and limitations of different frameworks can provide insights to the managers for implementation. Originality/value – Some literature reviews on MPM and MPM frameworks are available today. This paper makes an attempt to provide a detailed and relevant literature review, besides adding value in this new and emerging area.
      Citation: Journal of Quality in Maintenance Engineering
      PubDate: Tue, 17 Feb 2015 10:42:06 GMT
      DOI: 10.1108/JQME-10-2013-0067
       
  • Subsea maintenance service delivery
    • Authors: Efosa E. Uyiomendo, Markeset Tore
      Pages: 34 - 54
      Abstract: Journal of Quality in Maintenance Engineering, Volume 21, Issue 1, Page 34-54, March 2015.
      Purpose – The purpose of this paper is to propose a multi-variable analysis (MVA) model for predicting potential delays in the delivery of subsea inspection, maintenance and repair (IMR) services. Design/methodology/approach – Based on data from 351 subsea IMR service jobs executed between 2006 and 2008, a MVA model is proposed for predicting the potential delays in the delivery of IMR services in different plausible scenarios. Findings – A model for predicting the delays in IMR service delivery, based on four practical variables that are readily available during the planning phase, was developed and tested. The factors contributing to delays in petroleum subsea IMR services based on importance are: water depth, weather, job complexity, job uncertainty as well as job complexity mix. Research limitations/implications – The MVA model is developed based on analyzing subsea IMR service jobs performed in the petroleum industry from 2006-2008. The model can be used in the planning stage to predict potential delays in service delivery based on practical variables available. Originality/value – The research proposes a MVA model for predicting delays in service delivery. The model is useful for predicting potential delays in service delivery and for improving the plan based on model analysis results.
      Citation: Journal of Quality in Maintenance Engineering
      PubDate: Tue, 17 Feb 2015 10:44:10 GMT
      DOI: 10.1108/JQME-11-2013-0071
       
  • A degradation model for maintenance improvement in respect of cost and
           availability
    • Authors: Christophe Letot, Pierre Dehombreux, Edouard Rivière-Lorphèvre, Guillaume Fleurquin, Arnaud Lesage
      Pages: 55 - 69
      Abstract: Journal of Quality in Maintenance Engineering, Volume 21, Issue 1, Page 55-69, March 2015.
      Purpose – The purpose of this paper is to highlight the need for degradation data in order to improve the reliability and the mean residual life estimation of a specific item of equipment and to adapt the preventive maintenance tasks accordingly. Design/methodology/approach – An initial reliability model which uses a degradation-based reliability model that is built from the collection of hitting times of a failure threshold. The proposed maintenance model is based on the cost/availability criterion. The estimation of both reliability and optimum time for preventive maintenance are updated with all new degradation data that are collected during operating time. Findings – An improvement for the occurrences of maintenance tasks which minimizes the mean cost per unit of time and increases the availability. Practical implications – Inspection tasks to measure the degradation level should be realized at least one time for each item of equipment at a specific time determined by the proposed methodology. Originality/value – The introduction of a criterion which helps the maintainer to decide to postpone or not the preventive replacement time depending on the measured degradation level of a specific item of equipment.
      Citation: Journal of Quality in Maintenance Engineering
      PubDate: Tue, 17 Feb 2015 10:43:58 GMT
      DOI: 10.1108/JQME-01-2013-0001
       
  • Bottleneck-based opportunistic maintenance model for series production
           systems
    • Authors: Binghai Zhou, Jiadi Yu, Jianyi Shao, Damien Trentesaux
      Pages: 70 - 88
      Abstract: Journal of Quality in Maintenance Engineering, Volume 21, Issue 1, Page 70-88, March 2015.
      Purpose – The purpose of this paper is to develop a bottleneck-based opportunistic maintenance (OM) model for the series production systems with the integration of the imperfect effect into maintenance activities. Design/methodology/approach – On the analysis of availability and maintenance cost, preventive maintenance (PM) models subjected to imperfect maintenance for different equipment types are built. And then, a cost-saving function of OM is established to find out an optimal OM strategy, depending on whether the front-bottleneck machines adopt OM strategy or not. A numerical example is given to show how the proposed bottleneck-based OM model proceeded. Findings – The simulation results indicate that the proposed model is better than the methods to maintain the machines separately and the policy to maintain all machines when bottleneck machine reaches its reliability threshold. Furthermore, the relationship between OM strategy and corresponding parameters is identified through sensitivity analysis. Practical implications – In practical situations, the bottleneck machine always determines the throughput of the whole series production system. Whenever a PM activity is carried out on the bottleneck machine, there will be an opportunity to maintenance other machines. Under such circumstances, findings of this paper can be utilized for the determination of optimal OM policy with the objective of minimizing total maintenance cost of the system. Originality/value – This paper presents a bottleneck-based OM optimization model with the integration of the imperfect effect as a new method to schedule maintenance activities for a series production system with buffers. Furthermore, to the best of the knowledge, this paper presents the first attempt to considering the bottleneck constraint on system capacity and diverse types of machines as a means to minimize the maintenance cost and ensure the system throughput.
      Citation: Journal of Quality in Maintenance Engineering
      PubDate: Tue, 17 Feb 2015 10:44:03 GMT
      DOI: 10.1108/JQME-09-2013-0059
       
  • Applying human factor analysis tools to a railway brake and wheel
           maintenance facility
    • Authors: Sarbjeet Singh, Rupesh Kumar, Uday Kumar
      Pages: 89 - 99
      Abstract: Journal of Quality in Maintenance Engineering, Volume 21, Issue 1, Page 89-99, March 2015.
      Purpose – The purpose of this paper is to demonstrate three techniques to extract human factor information from specific railway maintenance tasks. It describes the techniques and shows how these tools can be applied to identify improvements in maintenance practices and workflow. Design/methodology/approach – Three case studies were conducted on single group of technicians (n=19) at a railway maintenance workshop in Luleå, Sweden. Case study I examined the posture of the technicians while they were changing the brake shoes of freight wagons; the study employed the Standard Nordic Questionnaire and a videotape using the Ovako Working Posture Analysis System (OWAS). Case study II looked at maintenance repair times required to change the wheel axle on freight wagons at the workshop. A video filming method suggested by the European Agency for Safety and Health at Work was used to measure actual maintenance time. Finally, case study III considered the technicians’ (n=19) perception of work demands, their control over the work and their social support while performing maintenance tasks (brake shoe and wheel axle maintenance); to this end, the case study used a demand control support questionnaire. Findings – In the first case study, the Standard Nordic Questionnaire confirmed that technicians at this particular railway vehicle maintenance workshop suffer from back and shoulder pain. The Ovako Working Posture Analysis showed that 21 percent of the working time required to fit the brake wedge and cotter pin fits into two OWAS categories: category 3, where “change is required as soon as possible,” and category 4, where “change is required immediately”. Problems stem from poor workplace layout, incorrect posture and inaccessibility of tools and components. In the second study, the video analysis indicated that the working time to change the wheel axle of a freight wagon is greatly affected by poor workplace layout. The third case study showed that the technicians have lower “psychological demands” (mean=13), “higher control over work” (mean=16) and “high social support” (mean=22). Practical implications – The objective of this study was to apply knowledge about human factors to the functional relationships between maintenance personnel, tasks and the working environment to improve safety. If the workplace layout, working posture, maintenance manuals and accessibility of tools are poorly planned, maintenance performance can be adversely affected. The results of this study should assist maintenance management to design new policies and guidelines for improving the work environment. Originality/value – Three case studies were conducted at a railway maintenance workshop in Luleå, Sweden, to collect data on how human factors affect various railway maintenance tasks.
      Citation: Journal of Quality in Maintenance Engineering
      PubDate: Tue, 17 Feb 2015 10:44:22 GMT
      DOI: 10.1108/JQME-03-2013-0009
       
  • Risk-based maintenance and remaining life assessment for gas turbines
    • Authors: Mohamed Khalifa, Faisal Khan, Joseph Thorp
      Pages: 100 - 111
      Abstract: Journal of Quality in Maintenance Engineering, Volume 21, Issue 1, Page 100-111, March 2015.
      Purpose – The purpose of this paper is to propose a quantitative model for risk-based maintenance and remaining life assessment for gas turbines. Design/methodology/approach – The proposed model uses historical failure and repair data from the operation of gas turbines. The time to failure of gas turbines is modeled using Weibull distribution. Findings – The total risk is estimated considering replacement cost, repair cost, operation cost, risk of failure and turbine remaining value after a specified period of time. Originality/value – The model is an effective tool to make optimal decisions regarding maintenance strategy (repair or replacement) and to assess the remaining life based on a comparison of the total risk. The literature review focusses on developing different models to make risk-based decisions regarding the selection of a maintenance strategy and maintenance interval, however, literature is silent regarding risk-based assessment of the equipment remaining life, which is the focus of present work. The model is tested and applied to ageing gas turbines in a cross-country pipeline.
      Citation: Journal of Quality in Maintenance Engineering
      PubDate: Tue, 17 Feb 2015 10:44:00 GMT
      DOI: 10.1108/JQME-12-2012-0047
       
  • Optimum time-censored simple ramp-stress accelerated life test sampling
           plan for the log-logistic distribution
    • Authors: Preeti Wanti Srivastava, Deepmala Sharma
      Pages: 112 - 132
      Abstract: Journal of Quality in Maintenance Engineering, Volume 21, Issue 1, Page 112-132, March 2015.
      Purpose – Acceptance sampling plans are designed to decide about acceptance or rejection of a lot of products on the basis of sample drawn from it. Accelerating the life test helps in obtaining information about the lifetimes of high reliability products quickly. The purpose of this paper is to formulate an optimum time censored acceptance sampling plan based on ramp-stress accelerated life test (ALT) for items having log-logistic life distribution. The log-logistic life distribution has been found appropriate for highly reliable components such as power system components and insulating materials. Design/methodology/approach – The inverse power relationship has been used to model stress-life relationship. It is meant for analyzing data for which the accelerated stress is nonthermal in nature, and frequently used as an accelerating stress for products such as capacitors, transformers, and insulators. The method of maximum likelihood is used for estimating design parameters. The optimal test plan is obtained by minimizing variance of test-statistic that decides on acceptability or rejectibility of lot. The optimal test plan finds optimal sample size, stress rates, sample proportion allocated to each stress and lot acceptability constant such that producer’s risk and consumer’s risk is satisfied. Findings – Asymptotic variance plays a pivotal role in determining the sample size required for a sampling plan for deciding the acceptance/rejection of a lot. The sample size is minimized by optimally designing a ramp-stress ALT so that the asymptotic variance is minimized. Originality/value – The model suggested is of use to quality control and reliability engineers dealing with highly reliable items.
      Citation: Journal of Quality in Maintenance Engineering
      PubDate: Tue, 17 Feb 2015 10:44:18 GMT
      DOI: 10.1108/JQME-03-2013-0010
       
 
 
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