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  • 651.
    Kumar, Uday
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.
    Reliability and risk based maintenance strategies1998Ingår i: Journal of Mines, Metals and Fuels, ISSN 0022-2755, Vol. XLV, nr 1, s. 76-80Artikel i tidskrift (Refereegranskat)
  • 652.
    Kumar, Uday
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.
    Risk assessment in environment impact studies for mining projects1999Ingår i: Mine planning equipment selections 1999 & Mine environment and economical issues / [ed] G.G. Pivnyak; R.K. Singhal, Dnipropetrovsk: NMUU , 1999, s. 587-592Konferensbidrag (Övrigt vetenskapligt)
  • 653.
    Kumar, Uday
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.
    Risk based maintenance strategies for mechanized and automated systems1998Ingår i: Proceedings of the 7th International Conference on Mine Planning and Equipment Selection: MPES-98, 1998, s. 647-651Konferensbidrag (Refereegranskat)
  • 654.
    Kumar, Uday
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.
    Service delivery strategy for mining systems2003Ingår i: APCOM 2003: 31st International Symposium on Application of Computers and Operations Research in the Minerals Industries / [ed] F.A. Camisani-Calzolari, Johannesburg: South African Institute of Mining and Metallurgy, 2003, s. 43-47Konferensbidrag (Refereegranskat)
    Abstract [en]

    Product designed characteristics like reliability and maintainability affect maintenance cost, service performance, and therefore product support strategy must be defined during design stage in terms of these two dimensions. Furthermore product support and service delivery strategy has considerable influence on the total life cycle cost and the economic viability of industrial systems/products. The paper presents a concept for the development of service delivery strategy for industrial products with a special reference to mining systems. In this paper we emphasize that the strategy for product support should not be centred only on ‘product' but it should also take into account the service delivery capability of the manufacturers/suppliers and users service organization, users competence and capability, product use location, logistics and infrastructures, etc., to arrive at the best performance and economic results. Such strategy should invariably include services supporting the client apart from considering services supporting the product. The discussion in the paper is based on the experiences from the manufacturing industry engaged in manufacturing of mining systems and the observed trends in technology and management of operation and maintenance of mining systems.

  • 655.
    Kumar, Uday
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.
    Study of problems caused by oversized boulders in a mine production system: a case study1997Ingår i: International Journal of Mining, Reclamation and Environment, ISSN 1748-0930, E-ISSN 1748-0949, Vol. 11, nr 2, s. 69-73Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The aim of this paper is to present a study that deals with the problem of oversized boulders in a mine production system. This work was performed to study and analyze the disturbances caused by oversized boulders and estimate their impact on the production system at the LKAB Kiruna Iron Ore Mine, Kiruna (KIOM). The results from this study show that by elimination of oversized boulders from the production process, the production capacity and system utilization of a mine like KIOM can be considerably improved.

  • 656.
    Kumar, Uday
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.
    System maintenance: trends in management and technology2008Ingår i: Handbook of Performability Engineering, London: Encyclopedia of Global Archaeology/Springer Verlag, 2008, s. 773-787Kapitel i bok, del av antologi (Övrigt vetenskapligt)
    Abstract [en]

    Modern day systems are large, complex and automated. The high demands on the performance of such systems has created a need for new management and engineering solutions in the area of the maintenance of the complex systems. This need is mainly motivated by the steeply increasing cost of downtime. This chapter presents an overview of the recent trends in management of maintenance function and maintenance technology.

  • 657.
    Kumar, Uday
    et al.
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.
    Ahmadi, AlirezaLuleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.Verma, Ajit KumarDepartment of Electrical Engineering, Indian Institute of Technology, Bombay, International Institute of Information Technology, P-14, Pune Infotech Park, Phase-1, Hinjawadi.Varde, PrabhakarBhabha Atomic Research Centre, Trombay, Mumbai.
    Current Trends in Reliability, Availability, Maintainability and Safety: An Industry Perspective2016Samlingsverk (redaktörskap) (Refereegranskat)
  • 658.
    Kumar, Uday
    et al.
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.
    Akersten, Per-Anders
    Availability and maintainability2008Ingår i: Encyclopedia of Quantitative Risk Analysis and Assessment, Chichester: John Wiley & Sons, 2008, s. 77-84Kapitel i bok, del av antologi (Övrigt vetenskapligt)
  • 659.
    Kumar, Uday
    et al.
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.
    Barabady, Javad
    Production assurance performance2007Konferensbidrag (Refereegranskat)
    Abstract [en]

    The concept of Production Assurance increasingly plays an important role to support the decision-making process for the managers and engineers dealing with challenges to meet the varying demand of customers as well as production control. The Production Assurance concept incorporates several other concepts such as availability, reliability, maintainability, supportability, capacity and so on. The aim of this paper is to discuss such concept and its applicability for manufacturing production processes. The other closely related topics to this concept such as throughput capacity, demand capacity and on-stream capacity are also presented.

  • 660.
    Kumar, Uday
    et al.
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.
    Ellingson, H.P.
    Development and implementation of maintenance performance indicators for the Norweigan oil and gas industry2000Ingår i: Euromaintenance 2000: the International 15th Maintenance Congress : 7th-10th of March, 2000 in Gothenburg, Sweden : conference proceedings, Swedish Maintenance Society (Fören. Underhållsteknik) , 2000, s. 221-228Konferensbidrag (Refereegranskat)
  • 661.
    Kumar, Uday
    et al.
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.
    Forsman, Bo
    Surface mining equipment and maintenance trends in the Scandinavian countries1992Ingår i: Journal of Mines, Metals and Fuels, ISSN 0022-2755, Vol. 40, nr 8-9, s. 267-269Artikel i tidskrift (Refereegranskat)
  • 662.
    Kumar, Uday
    et al.
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.
    Galar, Diego
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.
    Maintenance in the Era of Industry 4.0: Issues and Challenges2018Ingår i: Quality, IT and Business Operations: Modeling and Optimization / [ed] Kapur P., Kumar U., Verma A., Singapore: Springer, 2018, s. 231-250Kapitel i bok, del av antologi (Refereegranskat)
    Abstract [en]

    The fourth generation of industrial activity enabled by smart systems and Internet-based solutions is known as Industry 4.0. Two most important characteristic features of Industry 4.0 are computerization using cyber-physical systems and the concept of “Internet of Things” adopted to produce intelligent factories. As more and more devices are instrumented, interconnected and automated to meet this vision, the strategic thinking of modern-day industry has been focused on deployment of maintenance technologies to ensure failure-free operation and delivery of services as planned.

    Maintenance is one of the application areas, referred to as Maintenance 4.0, in the form of self-learning and smart system that predicts failure, makes diagnosis and triggers maintenance. The paper addresses the new trends in manufacturing technology based on the capability of instrumentation, interconnection and intelligence together with the associated maintenance challenges in the era of collaborative machine community and big data environment.

    The paper briefly introduces the concept of Industry 4.0 and presents maintenance solutions aligned to the need of the next generation of manufacturing technologies and processes being deployed to realize the vision of Industry 4.0.The suggested maintenance approach to deal with new challenges due to the implementation of industry 4.0 is captured within the framework of eMaintenance solutions developed using maintenance analytics. The paper is exploratory in nature and is based on literature review and study of the current development in maintenance practices aligned to industry 4.0.

  • 663.
    Kumar, Uday
    et al.
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.
    Galar, Diego
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.
    Parida, Aditya
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.
    Stenström, Christer
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.
    Maintenance audits using balanced scorecard and maturity model2011Ingår i: Maintworld, ISSN 1798-7024, E-ISSN 1799-8670, nr 3, s. 34-40Artikel i tidskrift (Övrigt vetenskapligt)
    Abstract [en]

    There is increasing interest in the use of maintenance performance measurement (MPM) and the possibility of using the maintenance audits for benchmarking metrics. This article proposes a methodology for simple measurement, one that accepts the indicators used on a scorecard with four perspectives and is hierarchized according to organizational level. The maintenance audit will evaluate the degree of fulfillment of objectives and the degree of satisfaction obtained from each of those perspectives. It will provide a clear picture of the current status of maintenance organization and the success of implemented policies taking into account the maintenance maturity model, i.e, the logical evolution of the maintenance function in the company.

  • 664.
    Kumar, Uday
    et al.
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.
    Galar, Diego
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.
    Parida, Aditya
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.
    Stenström, Christer
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.
    Berges, L.
    University of Zaragoza.
    Maintenance performance metrics: a state of the art review2011Ingår i: MPMM 2011: Maintenance Performance Measurement & Management: Conference Proceedings / [ed] Diego Galar; Aditya Parida; Håkan Schunnesson; Uday Kumar, Luleå: Luleå tekniska universitet, 2011, s. 3-34Konferensbidrag (Refereegranskat)
    Abstract [en]

    This paper provides an overview of research and developments in the measurement of maintenance performance. It considers the problems of various measuring parameters and comments on the lack of structure in, and references for, the measurement of maintenance performance.The main focus is to determine how value can be created for organizations by measuring maintenance performance, looking at such maintenance strategies as condition based maintenance, reliability centered maintenance, e-maintenance etc. In other words, the objectives are to find frameworks or models that can be used to evaluate different maintenance strategies and determine the value of these frameworks for an organization.The paper asks the following research questions:- What approaches and techniques are used for Maintenance Performance Measurement (MPM) and which MPM techniques are optimal for evaluating maintenance strategies?- In general, how can MPM create value for organizations, and more specifically, which system of measurement is best for which maintenance strategy?The body of knowledge on maintenance performance is both quantitative and qualitative based. Quantitative approaches include economic and technical ratios, value-based and balanced scorecards, system audits, composite formulations, and statistical and partial maintenance productivity indices. Qualitative approaches include human factors, amongst others. Qualitative-based approaches are adopted because of the inherent limitations of effectively measuring a complex function such as maintenance through quantitative models. Maintenance decision makers often come to the best conclusion using heuristics, backed up by qualitative assessment, supported by quantitative measures. Both maintenance performance perspectives are included in this overview.

  • 665.
    Kumar, Uday
    et al.
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.
    Galar, Diego
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.
    Parida, Aditya
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.
    Stenström, Christer
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.
    Berges, Luis
    University of Zaragoza.
    Maintenance performance metrics: a state-of-the-art review2013Ingår i: Journal of Quality in Maintenance Engineering, ISSN 1355-2511, E-ISSN 1758-7832, Vol. 19, nr 3, s. 233-277Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Purpose - This paper provides an overview of research and development in the measurement of maintenance performance. It considers the problems of various measuring parameters and comments on the lack of structure in and references for the measurement of maintenance performance. The main focus is to determine how value can be created for organizations by measuring maintenance performance, examining such maintenance strategies as condition-based maintenance, reliability-centred maintenance, e-maintenance, etc. In other words, the objectives are to find frameworks or models that can be used to evaluate different maintenance strategies and determine the value of these frameworks for an organization.Design/methodology/approach - A state-of-the-art literature review has been carried out to answer the following two research questions. Firstly, what approaches and techniques are used for maintenance performance measurement (MPM) and which MPM techniques are optimal for evaluating maintenance strategies? Secondly, in general, how can MPM create value for organizations and, more specifically, which system of measurement is best for which maintenance strategy?Findings - The body of knowledge on maintenance performance is both quantitatively and qualitatively based. Quantitative approaches include economic and technical ratios, value-based and balanced scorecards, system audits, composite formulations, and statistical and partial maintenance productivity indices. Qualitative approaches include human factors, amongst other aspects. Qualitatively based approaches are adopted because of the inherent limitations of effectively measuring a complex function such as maintenance through quantitative models. Maintenance decision makers often come to the best conclusion using heuristics, backed up by qualitative assessment, supported by quantitative measures. Both maintenance performance perspectives are included in this overview.Originality/value - A comprehensive review of maintenance performance metrics is offered, aiming to give, in a condensed form, an extensive introduction to MPM and a presentation of the state of the art in this field.

  • 666.
    Kumar, Uday
    et al.
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.
    Granholm, Sven
    Reliability centred maintenance: a tool for higher profitability1990Ingår i: Maintenance, ISSN 0953-2110, Vol. 5, nr 3, s. 23-26Artikel i tidskrift (Refereegranskat)
  • 667.
    Kumar, Uday
    et al.
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.
    Granholm, Sven
    Reliability technique: a powerful tool for mine operators1988Ingår i: Mineral resources engineering, ISSN 0950-6098, E-ISSN 2047-606X, Vol. 1, nr 1, s. 13-28Artikel i tidskrift (Refereegranskat)
  • 668.
    Kumar, Uday
    et al.
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.
    Granholm, Sven
    Luleå tekniska universitet.
    Some simple graphical methods for reliability analysis in mines1991Ingår i: International Conference Reliability, Production and Control in Coal Mines : September 1991, Wollongong, New South Wales, Parkville, Victoria: The Australian Institute of Mining and Metallurgy , 1991, s. 36-41Konferensbidrag (Refereegranskat)
    Abstract [en]

    The current emphasis within the mining industry to reduce the cost of production has stimulated interest in the fields of maintenance and operational reliability of capital intensive mining equipment. From an economic point of view, high reliability is desirable to reduce the maintenance costs of the systems. Two graphical methods consider reliability analysis. The first one, the method of Total Time on Test (TTT)-plotting deals with the reliability data which are free from trend and serial correlation. The second method which is based on time dependent modelling approach deals with the data which are not free from trends and serial correlation. The examples show how these graphical methods can be used to calculate the optimal maintenance intervals for components or systems

  • 669.
    Kumar, Uday
    et al.
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.
    Granholm, Sven
    Luleå tekniska universitet.
    Elbrond, Jörgen
    Mine system availability concepts1987Ingår i: International Journal of Mining, Reclamation and Environment, ISSN 1748-0930, E-ISSN 1748-0949, Vol. 1, nr 3, s. 209-213Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    During the last few years, there has been a marked tendency in mining industry to adopt complex and sophisticated technology to make mining operations economically viable. The concepts of integrated operating systems are being gradually introduced with increasing pace of automation in mines. This paper discusses the concepts and various forms of system availabilities which can be used by mine engineers and managers for controlling the system performance. Examples are given to show the differences between these availabilities. The concept of availability target setting is also introduced in brief.

  • 670.
    Kumar, Uday
    et al.
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.
    Huang, Yi
    Luleå tekniska universitet.
    Reliability analysis of a mine production system: a case study1993Ingår i: 1993 proceedings: Annual Reliability and Maintainability Symposium : Atlanta, Georgia USA, 1993 January (25) 26 - 28, Piscataway, NJ: IEEE Communications Society, 1993, s. 167-172Konferensbidrag (Refereegranskat)
    Abstract [en]

    Generally, in the mining industry, reliability modeling and analysis is yet to be recognized as one of the effective and systematic methods for acquiring information about critical units and operations. However, at the LKAB Kiruna Iron Ore Mine in Sweden, which is a world leader in the application of advanced mining technology, reliability and maintainability analysis techniques have been gradually accepted as standard tools for planning and operation of automatic and complex mining systems since the mid-80s. This paper deals with reliability analysis and modeling of the production system at the Kiruna mine. This analysis has helped in identifying the critical and sensitive subsystems in the mine production system which have major failure consequences. Since a large number of random variables (phenomena) are involved in the analysis, a simulation program SIMURES was developed to model the reliability characteristics of the production process and analyze the criticality of the various units and operations. This simulation program has helped in evaluating the gain in production volume with improvement in reliability of the various units and thus forming a basis for future investment for increasing the production system efficiency and capability

  • 671.
    Kumar, Uday
    et al.
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.
    Huang, Yi
    Luleå tekniska universitet.
    Reliability modeling and analysis of the production system at the Kiruna iron ore mine, Kiruna1992Rapport (Övrigt vetenskapligt)
  • 672.
    Kumar, Uday
    et al.
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.
    Karim, Ramin
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.
    Current trends in maintenance engineering2011Ingår i: International Journal of Performability Engineering, ISSN 0973-1318, Vol. 7, nr 6, s. 503-504Artikel i tidskrift (Övrigt vetenskapligt)
  • 673.
    Kumar, Uday
    et al.
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.
    Klefsjö, Bengt
    Luleå tekniska universitet, Institutionen för ekonomi, teknik och samhälle, Industriell Ekonomi.
    Reliability analysis of hydraulic systems of LHD machines by using the power law process model1990Rapport (Övrigt vetenskapligt)
  • 674.
    Kumar, Uday
    et al.
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.
    Klefsjö, Bengt
    Luleå tekniska universitet, Institutionen för ekonomi, teknik och samhälle, Industriell Ekonomi.
    Reliability analysis of hydraulic systems of LHD machines using the power law process model1992Ingår i: Reliability Engineering & System Safety, ISSN 0951-8320, E-ISSN 1879-0836, Vol. 35, nr 3, s. 217-224Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Previously, a preliminary study of the reliability characteristics of a fleet of load-haul-dump (LHD) machines deployed at Kiruna mine showed that the engine and the hydraulics are the two most critical subsystems. Hydraulic systems are selected for further study because such systems are still under a development phase. Maintenance data for two years for these machines are analyzed. The tests for trends and serial correlation show that times between successive failures for the hydraulic systems are in most cases not independent and identically distributed. Goodness-of-fit tests show that the power law process model provides a good fit to the failure data of the hydraulic systems. Methods for parameter estimation in the power law process model and estimation of optimal maintenance intervals for such systems are presented. Emphasis is on the use of graphical methods for data analysis (14 refs.)

  • 675.
    Kumar, Uday
    et al.
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.
    Klefsjö, Bengt
    Luleå tekniska universitet, Institutionen för ekonomi, teknik och samhälle, Industriell Ekonomi.
    Granholm, Sven
    Luleå tekniska universitet.
    Reliability investigation for a fleet of load-haul-dump machines in a Swedish mine1989Ingår i: Reliability Engineering & System Safety, ISSN 0951-8320, E-ISSN 1879-0836, Vol. 26, nr 4, s. 341-361Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The recent trends of deployment of complex and capital intensive equipment in mines has created interest in the field of maintenance and operational reliability of this equipment. The failure consequences associated with random equipment failures have considerable influence on the total operating cost of a highly mechanized mining system. Keeping this in view, a reliability investigation was initiated for a fleet of diesel operated load-haul-dump (LHD) machines in a Swedish mine. The goal is to estimate the operational reliability of these machines, locate items or assemblies which need improvement in design to enhance the reliability and to decide the duration of optimal preventive maintenance. Failure data for one year of LHD machines are analysed using the recently developed graphical technique of total time on test (TTT) plotting. Analytical methods like Kolmogorov-Smirnov test and maximum likelihood estimation are used in the analysis. The importance of testing the reliability data for the presence of trends and serial correlation is also emphasized.

  • 676.
    Kumar, Uday
    et al.
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.
    Liyanage, J.P.
    University of Stavanger.
    Design & development of maintenance measurement system for the off-shore industry2000Ingår i: Proceedings of the 3rd International Conference on Quality, Reliability, and Maintenance: QRM 2000 : held at St Edmund Hall, University of Oxford, UK, 30th-31st March 2000 / [ed] G.J. McNulty, Bury St Edmunds: Institution of Mechanical Engineers, 2000, s. 227-230Konferensbidrag (Refereegranskat)
  • 677.
    Kumar, Uday
    et al.
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.
    Parida, Aditya
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.
    Guest editorial2009Ingår i: Journal of Quality in Maintenance Engineering, ISSN 1355-2511, E-ISSN 1758-7832, Vol. 15, nr 2Artikel i tidskrift (Refereegranskat)
  • 678.
    Kumar, Uday
    et al.
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.
    Parida, Aditya
    Maintenance performance measurement system2008Ingår i: Complex system maintenance handbook, London: Encyclopedia of Global Archaeology/Springer Verlag, 2008, s. 459-478Kapitel i bok, del av antologi (Övrigt vetenskapligt)
  • 679.
    Kumar, Uday
    et al.
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.
    Parida, Aditya
    Maintenance performance measurement: the need of the hour for the mechanized mining industry2006Ingår i: Asian Mining : Towards a New Resurgence: Proceedings of First Asian Mining Congress / [ed] L.K. Bose; B.C. Bhattacharya, The Mining, Geological and Metallurgical Institute of India , 2006, Vol. 1Konferensbidrag (Refereegranskat)
  • 680.
    Kumar, Uday
    et al.
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.
    Parida, Aditya
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.
    Karim, Ramin
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.
    Special issue on eMaintenance solutions and technologies: guest editorial2010Ingår i: International Journal of Systems Assurance Engineering and Management, ISSN 0975-6809, E-ISSN 0976-4348, Vol. 1, nr 3, s. 187-188Artikel i tidskrift (Refereegranskat)
  • 681.
    Kumar, Uday
    et al.
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.
    Rutqvist, J.
    Aitik.
    Jadmalm, R-E.
    Aitik.
    Truck maintenance at the Aitik copper mine1989Ingår i: International Journal of Mining, Reclamation and Environment, ISSN 1748-0930, E-ISSN 1748-0949, Vol. 3, nr 4, s. 181-186Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The operation and maintenance activities are integrated to a greater extent at Aitik to enhance the total productivity of the mine. The area of maintenance is identified as a strategic cost center by the Aitik management for cost control. This paper discusses the maintenance practice, the organizational set up, the achivements and the maintenance strategy for the coming years for the Transport Division of the Aitik mine.

  • 682.
    Kumar, Uday
    et al.
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.
    Åhrén, Thomas
    Maintenance performance measurement system2006Ingår i: Proceedings of the 18th Congress of Euromaintenance / [ed] G. Walt; H. Behrend, Cavelti AG , 2006, s. 531-536Konferensbidrag (Refereegranskat)
  • 683.
    Kumar, Uday
    et al.
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.
    Åhrén, Thomas
    Use of maintenance performance indicators: a case study at Banverket2004Ingår i: Proceedings of the Fifth Asia Pacific Industrial Engineering and Management Systems Conference: APIEMS 2004, 2004Konferensbidrag (Refereegranskat)
    Abstract [en]

    In Sweden, the national railroad system is owned and operated by the state which means that political and social considerations have to be taken in to account; e.g. safety and environmental impact as well as public demands for safe, reliable and cost-effective means of transportation. The railroad is therefore strictly governed by regulations and government legislations; containing technical limitations and financial targets, many of these are in use as performance indicators. In order to get a broader and better control of goal fulfilment, the Swedish National Rail Administration (Banverket) has introduced the balanced scorecard concept during the last year. In order to meet stakeholders' requirement, Banverket have modified the standard balanced scorecard. This paper presents a case study identifying the use of performance indicators by Banverket. We discuss the different types and forms of indicators used by Banverket. An attempt is also made to analyze the impact of such indicators on the organisational goal and strategy through a link and effect model. We also examine who owns these indicators, who uses them and for what purposes and whether these indicators conform to the recommended standards and prevalent regulations.

  • 684.
    Kumari, Jaya
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.
    Asset Management of Railway Tracks Using Stochastic Petri Nets2019Självständigt arbete på avancerad nivå (masterexamen), 80 poäng / 120 hpStudentuppsats (Examensarbete)
    Abstract [en]

    Railways are one of the most important transport systems. It is crucial to have a rail network that is safe, reliable and available. Asset Management for railways involves the optimization of the maintenance activities based on asset condition, life cycle cost and availability of equipment. Irregularities in the track cause the wear of rail resulting in passenger discomfort, speed restrictions and line closures. The track is inspected for these irregularities and corrected using a tamping vehicle. The degradation behavior of the track can be modelled to predict the future degradation. This prediction forms the basis of the maintenance planning based on the expected track condition. A petri net model can be used to simulate the track degradation, inspection and maintenance process over a period of 20 years, and the outputs of the model are used for LCC analysis. Further, the cost is optimized with the safety risk to suggest maintenance threshold levels and Inspection Interval. The proposed methodology will assist the maintenance decision system for Asset Management of Railway track, which is strategic and cost effective. This methodology is demonstrated using a case study of a Line 414 in Sweden, by modelling the track behavior with Standard Deviation of Longitudinal Level. It can be further expanded and adapted for maintenance planning for similar assets within railways.

  • 685.
    Kumer, Dhananjay
    et al.
    Luleå tekniska universitet.
    Klefsjö, Bengt
    Luleå tekniska universitet, Institutionen för ekonomi, teknik och samhälle, Industriell Ekonomi.
    Kumar, Uday
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.
    Reliability analysis of power transmission cables of electric mine loaders using the proportional hazards model1992Ingår i: Reliability Engineering & System Safety, ISSN 0951-8320, E-ISSN 1879-0836, Vol. 37, nr 3, s. 217-222Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The proportional hazards model (PHM) is a powerful technique which can be used to investigate the effects of operating environment and the diagnostic variables (covariates) associated with an item on its life length. The effects of two different designs and maintenance on the reliability of a power transmission cable of an electric mine loader is investigated using PHM. The purpose is to illustrate the application of this model in making decisions about selecting the proper material or designing an item to meet the required purpose efficiently. (11 refs.)

  • 686.
    Kyriakidis, Miltos
    et al.
    ETH Zurich, Future Resilient Systems, Singapore - ETH Centre, Singapore.
    Simanjuntak, Samuel
    Centre for Transport Studies, Imperial College London, United Kingdom.
    Singh, Sarbjeet
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.
    Majumdar, Arnab
    Centre for Transport Studies, Imperial College London, United Kingdom.
    The indirect costs assessment of railway incidents and their relationship to human error: The case of Signals Passed at Danger2019Ingår i: Journal of Rail Transport Planning & Management, ISSN 2210-9706, E-ISSN 2210-9714, Vol. 9, s. 34-45Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The majority of railway incidents result neither in passenger nor operators harm, nor they lead to any severe damage on the rolling stock or the infrastructure. Nevertheless, such incidents result in financial loses, broadly known as indirect costs, which are difficult to identify, isolate, evaluate, and quantify. This paper introduces a framework to quantify the indirect costs in railway operations. Furthermore, as degraded human performance remains a major contributor to operational errors and railway incidents, this study explores for associations between the indirect costs and the factors that affect and contribute to degraded human performance. The framework was implemented in the calculation of the Category A1 Signals Passed at Danger (SPADs) indirect costs. Data was obtained from two UK train operators, while the associated human performance was analysed using the Railway-Performance Shaping Factors (R-PSFs) taxonomy. Employing Spearman's rank order correlation and Fisher's exact statistical tests the associations between R-PSFs and indirect costs were reviewed. Results show significant correlations between the R-PSFs and indirect costs, but only if the importance and severity of every individual R-PSFs is considered. We expect our findings to aid the relevant stakeholders on their efforts to make better decisions on improving safety performance of railway operations.

  • 687.
    Källström, Elisabeth
    et al.
    Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Produkt- och produktionsutveckling. Volvo Construction Equipment, Eskilstuna, Sweden.
    Lindström, John
    Luleå tekniska universitet, Institutionen för system- och rymdteknik, Digitala tjänster och system.
    Håkansson, Lars
    Linnaeus University, Växjö, Sweden.
    Karlberg, Magnus
    Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Produkt- och produktionsutveckling.
    Lin, Jing
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.
    Vibration-based Condition Monitoring of Heavy Duty Machine Driveline Parts: Torque Converter, Gearbox, Axles and Bearings2019Ingår i: International Journal of Prognostics and Health Management, ISSN 2153-2648, E-ISSN 2153-2648, Vol. 10, artikel-id 014Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    As more features are added to the heavy duty construction equipment, its complexity increases and early fault detection of certain components becomes more challenging due to too many fault codes generated when a failure occurs. Hence, the need to complement the present onboard diagnostic methods with more sophisticated diagnostic methods for adequate condition monitoring of the heavy duty construction equipment in order to improve uptime. Major components of the driveline (such as the gearbox, torque converter, bearings and axles) are such components. Failure of these major components of the driveline may results in the machine standing still until a repair is scheduled. In this paper, vibration based condition monitoring methods are presented with the purpose to provide a diagnostic framework possible to implement onboard for monitoring of critical driveline parts in order to reduce service cost and improve uptime. For the development of this diagnostic framework, sensor data from the gearbox, torque converter, bearings and axles are considered. Further, the feature extraction of the data collected has been carried out using adequate signal processing methods, which includes, Adaptive Line Enhancer, Order Power Spectrum respectively. In addition, Bayesian learning was utilized for adaptively learning of the extracted features for deviation detection. Bayesian learning is a powerful prediction method as it combines the prior information with knowlegde measured to make update. The results indicate that the vibration properties of the gearbox, torque converter, bearings and axle are relevant for early fault detection of the driveline. Furthermore, vibration provide information about the internal features of these components for detecting deviations from normal behavior.

    In this way, the developed methods may be implemented onboard for the continuous monitoring of these critical driveline parts of the heavy duty construction equipment so that if their health starts to degrade a service and/or repair may be scheduled well in advance of a potential failure and in that way the downtime of a machine may be reduced and costly replacements and repairs avoided.

  • 688.
    Lagnebäck, Robert
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.
    Evaluation of wayside condition monitoring technologies for condition-based maintenance of railway vehicles2007Licentiatavhandling, sammanläggning (Övrigt vetenskapligt)
    Abstract [sv]

    Luossavaara-Kiirunavaara AB (LKAB) är ett Svenskt gruvbolag som bryter järnmalm. Man har som målsättning att bli en av de ledande leverantörerna i världen av järnmalmsprodukter. I kedjan från brytning till slutkund, spelar transporteffektivitet en avgörande roll i företagets totala ekonomiska resultat. Transporterna av malm från LKAB:s gruvor i Kiruna och Malmberget utförs med järnvägstransporter till utskeppningshamnar i Narvik och Luleå. Järnvägstransporterna utförs av LKAB:s dotterbolag Malmtrafik i Kiruna AB (MTAB) på den Svenska sidan och av Malmtrafikk AS (MTAS) på den Norska sidan. Järnvägs transporternas effektivitet är därför en nyckelfunktion i LKAB:s gruvbrytningsverksamhet. I en benchmarkingstudie utförd på den totala effektiviteten av verksamheten hos gruvverksamheter med tunga järnvägstransporter runt om i världen blev det uppdagat att det finns en potential att förbättra effektiviteten hos LKAB:s järnvägstransporter. En av faktorerna som har potential att förbättra effektiviteten är underhållsstrategin. Det finns tydliga indikationer på att en förändring från ett förutbestämt underhåll till ett tillståndsbaserat underhåll skulle kunna öka järnvägstransporternas effektivitet. Syftet med denna licentiat avhandling är att utvärdera tekniska system som kan placeras vid spåret och användas som tillstånds övervakande utrustning för järnvägsfordon för att stödja en implementering av en tillståndsbaserad underhållsstrategi.För att uppnå det utsatta syftet har fem fallstudier, samt en litteratur studie genomförts. De fem fallstudierna har utförts för att öka kunskapen om egenskaperna hos tillgänglig tillståndsövervakande utrustning för placering vid spåret som stöd för tillståndsbaserat underhåll av järnvägsfordon. Litteraturstudien har fokuserats på järnvägsverksamheter i runt om i världen med speciellt fokus på utveckling, utplacering och användande av spårbunden tillståndsövervakningsutrustning .Litteraturstudien indikerar att det pågår en ökande implementering och användning av tillståndsövervakande utrustning för järnvägsfordon. Genom studierna har det framkommit att den direkta interaktionen mellan hjul och räl också skapar en stor potential för besparingar på infrastrukturen med hjälp av en implementering av spårbunden tillståndsövervakande utrustning för järnvägsfordonen.Case studierna belyser nödvändigheten av att ha olika system som kan komplettera varandra genom att mäta olika parametrar. Det är också viktigt att systemen är integrerade med existerande system och metoder för att uppnå de potentiella fördelarna med den nya teknologin. Det är dessutom viktigt att ha ett gemensamt tillvägagångssätt mellan både infrastrukturägare och tågoperatörer i implementeringen och användandet av spårbunden tillståndsövervakande utrustning, eftersom teknologin kan stödja en tillståndsbaserad underhålls strategi för båda sidor, vilket kan ha stor positiv inverkan på järnvägsdriftens effektivitet.

  • 689. Lagnebäck, Robert
    et al.
    Kumar, Uday
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.
    Potential of condition monitoring on railway vehicles: a case study2005Ingår i: Safety, environment and productivity: proceedings ; 8th International Heavy Haul Conference, Rio de Janeiro, June 14 - 16, 2005 ; [IHHC], Virginia Beach, Va: International Heavy Haul Association , 2005Konferensbidrag (Refereegranskat)
  • 690.
    Laitila, Johan
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.
    Förbättrat underhåll av fasta korsningar i spårväxlar2019Självständigt arbete på grundnivå (yrkesexamen), 10 poäng / 15 hpStudentuppsats (Examensarbete)
    Abstract [sv]

    Järnvägen har möjliggjort boende och arbete på olika orter, genom tågpendling, samt intresset för godstransporter på järnvägen ökar. För att upprätthålla en god status på järnvägen behövs mycket pengar, samtidigt som dess tillgänglighet påverkar många människor. Detta gör det än mer angeläget med en robust järnvägsanläggning, med hög tillgänglighet samt en god punktlighet för både person- och godståg. Ett bättre planerat underhåll möjliggör en längre användbar livstid för samtliga komponenter i järnvägsanläggningen. Som anläggningsdel förorsakar spårväxlar den högsta kostnaden i en banöverbyggnad, med korsningar som ett av de mest frekventa komponentbytena. Idag är den användbara livstiden på fasta mangankorsningar för låg, ca 100 MBrt, då den förväntas vara mellan 100–500 MBrt. Detta ligger till grund för arbetet där syftet är att undersöka hur det förbyggande underhållet av fasta korsningar i spårväxlar bättre kan planeras, utföras och följas upp för att förlänga dess användbara livstid. Vidare är målet med examensarbetet att genom en nulägesanalys, som innefattar dagens erfarenheter, förslag till förbättrade arbetsmetoder och morgondagens informationsinhämtning, fastställa vilken information som kommer att krävas för att på ett bättre sätt planera underhållet, samt att fastställa vilka underhållsåtgärder som är nödvändiga för det förebyggande underhållet av fasta korsningar i spårväxlar. Baserat på detta utformas en underhållsplan med tillhörande LCC för fasta korsningar i spårväxlar. Vidare ska samtliga underhållsåtgärder i underhållsplanen vara planeringsbara minst 3 månader i förväg, och det är önskvärt att underhållsplanen ska sträcka sig 36 månader framåt.

    Initialt utförs en nulägesanalys och arbetet fortsätter med förslag på förbättrade arbetsmetoder. Båda i avseende hur och när underhåll utförs på fasta mangankorsningar idag ute i anläggningen. Avslutningsvis presenteras en underhållsplan med intervall samt de resurser som krävs för de underhållsåtgärder som ska utföras. Dessa åtgärder är byte av korsning, inslipning, slipning, påsvets, spårriktning/stoppning, shimsning av moträl, byte av korkgummi samt ballastrening. Tillhörande till underhållsplanen utformas en kalkyl för livscykelkostnad, LCC, där arbete efter nuläge samt arbete efter underhållsplan jämförs. Resultatet från arbetet visar att samtliga entreprenörer anser att brist på tid i spår är en starkt bidragande faktor till att fasta korsningar byts. Detta tillsammans med att rätt förebyggande underhållsåtgärder som inslipning och förebyggande slipning för att upprätthålla profil, samt kontroll av spårläge och åtgärd vid behov inte görs. Vidare utför entreprenören ingen uppföljning av utförda underhållsåtgärder, utan beslut om underhållsåtgärder baseras till stor del på säkerhets- och underhållsbesiktningar. Detta medför att de arbetar mest avhjälpande, med åtgärd av besiktningsanmärkning. Dock för växelrevision och systematiskt växelunderhåll är erfarenhet, god lokalkännedom och god kännedom om anläggningen den avsevärt största informationskällan för entreprenören idag. Infrastrukturägaren utför även en viss leveransuppföljning, dock inte i tillräcklig utsträckning för att säkerställa att de får det som beställts. Registrering av samtliga förebyggande underhållsåtgärder bör förbättra och förenkla infrastrukturägarens uppföljning. Vidare för att möjliggöra en mer strategisk underhållsplanering behövs metoder för tillståndsbaserat underhåll tas fram, i syfte att få en bättre uppfattning om degradering av profilen för en fast mangankorsning. Till detta krävs automatiska maskinella mätningar, vilket gör mätningar reproducerbara och mätdata går att trenda. Slutligen den bristfälliga återrapporteringen av förebyggande underhållsåtgärder i kombination med entreprenörens hemlighållande av exakt underhållskostnad, resulterar i att underhållskostnaden för korsningar inte kan redovisas på en aggregerad och individuell nivå.

  • 691.
    Lamban, Pilar
    et al.
    Departamento de Ingeniería de Diseño y Fabricación, Universidad de Zaragoza.
    Royo, Jesus
    Departamento de Ingeniería de Diseño y Fabricación, Universidad de Zaragoza.
    Valencia, Javier
    Departamento de Ingeniería de Diseño y Fabricación, Universidad de Zaragoza.
    Berges, Luis
    Departamento de Ingeniería de Diseño y Fabricación, Universidad de Zaragoza.
    Galar, Diego
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.
    Modelo para el cálculo del costo de almacenamiento de un producto: caso de estudio en un entorno logístico2013Ingår i: Dyna, ISSN 0012-7353, Vol. 80, nr 179, s. 23-32Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Several authors have established how important it is for companies to have accurate product cost information, especially in the actual environment of intense global competition. However, it has been shown that traditional systems do not satisfy these business demands, so in recent years new cost methods have been proposed, nevertheless these are still inaccurate. It is because of this situation that this paper presents a new methodology for determining the storage cost of a product that can be extrapolated to all the links of the supply chain. In turn, we propose a new cost driver, the logistics index, which helps to provide more precise information than traditional methods. It concludes by showing a business case where this model is implemented in a Spanish logistics company.

  • 692.
    Lanke, Amol
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.
    Mine Production Assurance Program- Development and Application2016Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
    Abstract [en]

    ssuring production forms a crucial part of mining business profitability. Factors related to various mine operations, activities and business processes can threaten required/planned mine production.   To address problems and ensure production level in mining, it is necessary to implement a mine production assurance program (MPA). In order to propose a guideline and its component, this study started by reviewing four such techniques used in process industries. Comparing the tools, techniques   and focus with mining productivity and production factors, it was observed that applicability of these methods for mining is limited due to lack of focus on equipment focus, cost focus and other parameters. Similarity of objectives and requirements of equipment focus lead to conclusion that PAP from oil and gas industry seems to be method which can guide MPA.\parAs a basis of MPA, an index is required to create a clear relationship between different situations which can occur in mining operation and production loss. A literature review on mining productivity improvement methods shows availability, utilisation and production performance of equipment are the key factors in determining overall production. A single index applicable for chain operation in mining is needed. A Mine Production index (MPi) is thus proposed. This index involves all three parameters for equipment productivity mentioned above.  Weights associated with MPi calculation for bottleneck equipment can point out critical factors in equipment operation. Once bottleneck equipment and relevant critical factors are known, further analysis can be carried out to determine the possible causes of production loss. By using MPi for machine operations, it is possible to rank machines in terms of production effectiveness. When the study applied MPi to chain operations in a mining case study, a crusher was determined as bottleneck equipment.\parMining operation is heavily influenced by internal and external uncertainties. Operational uncertainties related to equipment includes its key factors leading to production i.e. availability, utilisation and performance. These factors are in turn dependent upon downtime, idle time, rated capacities. External parameters related to weather are based upon location of mining operation. Influence of these factors on production volume, could be used for better decision making during mining operations optimization. To effectively propose a method for correlating internal and external parameters with production volume, case studies in an open pit mine were conducted. During these case studies a multi-regression modelling methodology is used. It was found that at system level availability is important criteria for increasing production. At level of shovel and truck fleet, availability and utilisation are most important characteristics to be focused for reduction in production uncertainty. Environmental factors are although correlate to less variation in production volume compared to operational factors.  Amongst considered environmental factors snowfall is highly influencing followed by rainfall.  At system level  use of maximum capacities of equipment and availability are key point for increasing production. Based on analysis of internal operational factors, it was concluded that capacity of shovel and trucks is underutilised. For shovels availability and idle time are influential factors. For trucks utilisation is highly correlated to production volume generated.  Analysis of environmental factors concluded that, period of zero snowfall and rainfall are perfect condition for equipment production increase. Period when either snowfall or rainfall stabilisation are also equivalent to achieve higher production. Although these production levels are significantly less than period without snow and rain

  • 693.
    Lanke, Amol
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.
    Mine production index: Development and application2014Licentiatavhandling, sammanläggning (Övrigt vetenskapligt)
    Abstract [en]

    Assuring production forms a crucial part of mining business profitability. Factors related to various mine operations, activities and business processes can threaten required/planned mine production. To address problems and ensure production level in mining, it is necessary to implement a mine production assurance program (MPA). Since such a guideline does not exist for mining as a process industry, this study started by reviewing four such techniques used in similar industries. These methods include: total productive maintenance, six sigma, a method prescribed by European foundation of quality management, and production assurance program (PAP) used in the oil and gas industry.These methods and techniques were reviewed according to their objectives and applications. Their implementation and achieved success was determined through a literature review and field participation/study. Comparing the tools, techniques and focus with mining productivity and production factors, it was observed that applicability of these methods for mining is limited due to a lack of tools for specific analysis or a lack of consideration of the requirements of mining. However, given certain similarities in objective and methods, PAP from the oil and gas industry may provide some guidance for MPA.As a basis of MPA, an index is required to create a clear relationship between different situations which can occur in mining operation and production loss. A literature review on mining productivity improvement methods shows availability, utilisation and production performance of equipment are the key factors in determining overall production. A single index applicable for chain operation in mining is needed. Overall equipment effectiveness (OEE) which includes these three elements has some limitations for application in mining. A Mine Production index (MPi) is thus proposed. This index involves all three parameters for equipment productivity mentioned above. It also consists of weights for each parameter. The weights in this study are determined through expert opinions/judgements using fuzzy analytical hierarchy process (FAHP). Equipment with low MPi can be labelled as bottlenecks. Weights associated with MPi calculation for bottleneck equipment can point out critical factors in equipment operation. Once bottleneck equipment and relevant critical factors are known, further analysis can be carried out to determine the exact cause of production loss.By using MPi for machine operations, it is possible to rank machines in terms of production effectiveness. When the study applied MPi to chain operations in a mining case study, a crusher was determined as bottleneck equipment. Further root cause analysis and uncertainty detection for bottleneck equipment is also possible, and this forms the basis for MPA.

  • 694.
    Lanke, Amol
    et al.
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.
    Ghodrati, Behzad
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.
    Comparison of Mine Production Index Factors for Rock Bolter and Shovel2016Ingår i: Current Trends in Reliability, Availability, Maintainability and Safety: An Industry Perspective / [ed] Uday Kumar; Alireza Ahmadi; Ajit Kumar Verma; Prabhakar Varde, Encyclopedia of Global Archaeology/Springer Verlag, 2016, s. 645-656Konferensbidrag (Refereegranskat)
    Abstract [en]

    MPi uses availability, utilisation and performance to compare and evaluate equipment. These measures apply to all equipment in mining. However equipment use in mining operations could lead to different evaluation of its availability, utilisation and production performance. MPi evaluation and comparison of equipment on MPi basis thus becomes difficult. Shovel and rock bolters are equipment used in open pit and underground mining respectively. Rock bolters are used to place bolts in mining room. Bolts reinforce rock masses through restraining the deformation within the rock masses. In open pit mining shovels are used for loading broken rock in truck for hauling. MPi can be used as scale for comparison of these equipment. However the operational difference between two equipment leads to different evaluation of MPi. Using hypothetical case study difference between availability, utilisation and performance of the rock bolters and shovel is studied. It was found that these parameters must be measured differently for rock bolters than shovel. Rock bolters availability and utilisation should be given less weights consideration as compared to other equipment in continuous mining operation. Its performance measurement it dependent upon bolts installed and capacity of bolts installation rather than tonnage of ore produced. This study can be helpful for evaluating MPi for equipment which are non-continuously used and lacks output in terms of ore tonnage..

  • 695.
    Lanke, Amol
    et al.
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.
    Ghodrati, Behzad
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.
    Reducing defects and achieving business profitability using innovative and lean thinking2013Ingår i: IEEE International Conference on Industrial Engineering and Engineering Management: IEEM 2013, Bangkok, Thailand; 10 - 13 December 2013, Piscataway, NJ: IEEE Communications Society, 2013, s. 1026-1030Konferensbidrag (Refereegranskat)
    Abstract [en]

    The case study conducted in magnet manufacturing shows that with use of innovative thinkingusing TRIZ an organization can achieve the quality ofproduct without sacrificing business goals. Cost of qualityand cost of manufacturing were both balanced with simplesolution to the production problems. Simple innovations leadto increased output capacity and reduction of defects. Thiscontributed to reducing the wastage of resources i.e. achieveLEAN. This case study holds a prime example of TRIZ andhow an manufacturing organization can benefit using such anew technique.

  • 696.
    Lanke, Amol
    et al.
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.
    Ghodrati, Behzad
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.
    Hoseinie, Hadi
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.
    Uncertainty Analysis of Production in Open Pit Mines: Effect of environmental conditions2016Ingår i: Archives of Mining Sciences, ISSN 0860-7001, E-ISSN 1689-0469Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Production volume by mining equipment is influenced by internal and external parameters. External parameters include weather conditions, human factors etc. This study shows impact of temperature, rainfall and snowfall on production volume achieved under influence of these factors in open pit mine.  The case study is carried out which include data from weather station near an open pit mine and production tonnage. Multi regression modelling in performed using stated factors and production volume.  It was observed that Snowfall and rainfall has impact on production volume. Temperature has no effect on payload achieved as represented by model. With increasing snowfall and rainfall decreases. Higher snowfall (0.8 meter to 1 meter) although has tends to lead higher tonnage compared to low snowfall (0 to 0.8meters). Rainfall causes decrease in production of ore, with increase in rainfall from 1.2 mm, there is sharp decrease in production volume. The optimization table shows that with either no snowfall coupled with maximum rainfall (39 mm) it is possible to achieve production levels of 120 thousand per day. With high snowfall (1.06 metres) and no rainfall, it is possible to achieve maximum of 118 thousand tonnes per day.

  • 697.
    Lanke, Amol
    et al.
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.
    Ghodrati, Behzad
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.
    Hoseinie, Hadi
    Department of Mining Engineering, Hamedan University of Technology, Hamedan.
    Uncertainty Analysis of Production in Open Pit Mines: operational parameter regression analysis of Mining Machinery2016Ingår i: Mining science, ISSN 2353-5423, Vol. 23, s. 147-160, artikel-id msc162312Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    In mining uncertainties related to equipment and operation are major reasons for loss of production. In order to address this issue a wide literature review was done in this study. It showed that reliability of equipment, spare part availability, automation of equipment are researched areas focused. However, a methodology which relates operational issues directly to production levels have been not studied with detailed analysis. In order to overcome this issue and propose, a method to achieve production assurance is the objective of this study. A case study with 2.5 years of data from a large open pit mine is carried out. Following the statistical principles, multiple regressions modeling with details analysis, optimization of payload and interpretation of analysis are used. It showed that at system level availability, utilization and maximum capacities are important criteria for finding root cause in loss of production. Model for shovel fleet showed that availability is most important characteristics hindering it to achieve higher level of production. It was also seen that 3 to 4 number of shovels are optimal for achieving current level of production. For truck fleet model represented that capacities involved are less important factor as compared to utilization of fleet.

  • 698.
    Lanke, Amol
    et al.
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.
    Ghodrati, Behzad
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.
    Lundberg, Jan
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.
    Production improvement techniques in process industries for adoption in mining: A comparative study2016Ingår i: International Journal of Productivity and Quality Management, ISSN 1746-6474, E-ISSN 1746-6482, Vol. 19, nr 3, s. 366-386Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    High profitability and customer satisfaction are of supreme importance for any business. To achieve both objectives, an organisation must design a structured approach. To achieve profitability, organisations look to principles of lean manufacturing and techniques such as EFQM, business excellence. This paper reviews such methodologies across different industries, comparing techniques and elements. Its objective is to determine which methodologies are most applicable to the Swedish mining industry and propose a method to achieve lean mining. To this end, the paper looks at the methodologies of a food manufacturing industry, an automobile component manufacturing company, the manufacturing and service sector, and the oil and gas industry. It finds that the method used in the oil and gas industry is more relevant to mining, even though it has some flaws. Further research is needed to adapt this method to the mining industry.

  • 699.
    Lanke, Amol
    et al.
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.
    Hoseinie, Hadi
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.
    Ghodrati, Behzad
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.
    Mine Production index (MPi): New method to evaluate effectiveness of mining machinery2014Konferensbidrag (Refereegranskat)
    Abstract [en]

    OEE has been used in many industries as measure of performance. However due to limitations of original OEE, it has been modified by various researchers. OEE for mining application is special version of classic equation, carries these limitation over. In this paper it has been aimed to modify the OEE for mining application by introducing the weights to the elements of it and termed as Mine Production index (MPi). As a special application of new index MPishovel has been developed by authors. This can be used for evaluating the shovel effectiveness. Based on analysis, utilization followed by performance and availability were ranked in this order. To check the applicability of this index, a case study was done on four electrical and one hydraulic shovel in a Swedish mine. The results shows that MPishovel can evaluate production effectiveness of shovels and determine effectiveness values in optimistic view compared to OEE. MPi with calculation not only give the effectiveness but also can predict which elements should be focused for improving the productivity.

  • 700. Lanke, Amol
    et al.
    Hoseinie, Hadi
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.
    Ghodrati, Behzad
    Mine Production index (MPi): new method to evaluate the effectiveness of mining machinery2014Konferensbidrag (Övrigt vetenskapligt)
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