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  • 1.
    Holmgren, Mattias
    et al.
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.
    Söderholm, Peter
    Trafikverket, Luleå.
    Process Analysis of Human Failures in Railway Maintenance2016Ingår 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. 381-393Konferensbidrag (Refereegranskat)
    Abstract [en]

    The aim of maintenance is to retain and restore the required functions of technical systems to ensure the productivity and efficiency of technical systems. However, improper maintenance, in the sense of incorrectly performed maintenance or lack of suitable maintenance activities, contributes to deterioration and, even more seriously, cause incidents and accidents. Therefore, it is important to identify hazards from occurred incidents and accidents to learn and avoid these hazards in the future. For that matter, in turn, documentation from occurred events should be done in a systematic way and then be an important part of the management system—and last, but not least, used for continuous improvement and risk reduction. This study aims to describe a process-oriented approach to analyse causes of human failures contributory to maintenance-related incidents and accidents, in order to support continuous risk reduction. The proposed methodology with supporting tools can be used for analysis purposes and guide decision making. The approach is illustrated by a case study at the Swedish railways

  • 2.
    Holmgren, Mattias
    et al.
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.
    Söderholm, Peter
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.
    A process approach to maintenance-related hazard identification2008Ingår i: International Journal of COMADEM, ISSN 1363-7681, Vol. 11, nr 1, s. 36-46Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    History has shown that maintenance contributes to incidents and accidents with extensive losses. The purpose of this paper is to describe a process approach for maintenance-related hazard identification, in order to support continuous risk reduction in maintenance activities. The proposed maintenance process model has been applied within a study of maintenance execution of DC-motors in paper-mills. However, both the model and the findings from its application are believed to be transferable to the maintenance of other critical technical systems. A recurring hazard is insufficient feedback. Hence, proper feedback may help to reduce risk. Further findings indicate that incidents manifested during execution may be due to hazards in other process phases. The maintenance of complex and critical systems is also affected by the work environment and knowledge of technicians, whose requirements should be fulfilled through appropriate organisational and technical support.

  • 3.
    Söderholm, Peter
    et al.
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.
    Holmgren, Mattias
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.
    Klefsjö, Bengt
    A process view of maintenance and its stakeholders2007Ingår i: Journal of Quality in Maintenance Engineering, ISSN 1355-2511, E-ISSN 1758-7832, Vol. 13, nr 1, s. 19-32Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Purpose - The purpose of this paper is to describe maintenance in a generic process model, in order to support an alignment of maintenance with other company internal processes aimed at fulfilling external stakeholder requirements. Design/methodology/approach - The proposed maintenance process model is based on existing theories and is illustrated by examples from a paper-mill case study related to the maintenance of DC-motors. Findings - The proposed model supports a holistic view of maintenance and the alignment of the maintenance process with other company internal processes, in order to fulfil external stakeholder requirements. Research limitations/implications - Further research could include an application of the proposed maintenance model to test its usefulness to identify stakeholders and also hazard diagnosis. Practical implications - The importance of vertical and horizontal alignment between the maintenance process and other processes in order to achieve effectiveness and efficiency is illustrated. The model can be used to increase the understanding of the role of maintenance within a company. Thereby, the proposed process model provides valuable support for effective, efficient, and continuous risk reduction. Originality/value - The proposed process view highlights that maintenance can contribute to the fulfilment of external stakeholders' requirements, which strengthens the proposition that maintenance should be seen as a business-process that creates value and not as something that is a "necessary evil".

  • 4.
    Holmgren, Mattias
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.
    Maintenance-related incidents and accidents: aspects of hazard identification2006Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
    Abstract [en]

    The satisfaction of stakeholders depends upon the fulfilment of their requirements. Two important stakeholder requirements related to technical systems are dependability and safety. However, system operation will gradually impair its performance leading to potentially hazardous states of the system. Maintenance is all activities aimed at retaining a system in, or restoring it to, a state where it can fulfil the stakeholders’ requirements. However, although maintenance is performed in order to ensure dependability and safety, incorrectly performed maintenance may contribute to accidents with extensive losses. Traditionally, human failures have often been appointed as one major cause of these maintenance-related accidents. However, human failures are not completely satisfactory as an explanation for incidents and accidents since there most often are other contributory causes to these failures. The purpose of this thesis is to explore and describe hazards contributory to maintenance-related incidents and accidents, in order to support continuous risk reduction. To fulfil the stated purpose, two case studies, supported by a literature study, have been performed. One case study focused on documented maintenance-related incidents and accidents within the Swedish railway. The second case study focused on perceived hazards in relation to maintenance execution within the Swedish paper industry. The railway case study indicates that improper infrastructure maintenance is a major cause of collisions and derailments within the Swedish railway. Furthermore, the study indicates that the three major maintenance-related hazards within the Swedish railway system are: communication errors, information retrieval errors and omitted operations. The study also proposes that it is not good enough to accept human failures, i.e. human error or rule violation, as a root cause of maintenance-related incidents and accidents. Both case studies show that a major maintenance-related hazard is insufficient communication between different activities associated with maintenance execution. Another common finding from the studies is that incidents manifested during maintenance execution might be caused by hazards in other maintenance-related activities within the maintenance process. In addition, both case studies show that a proposed process model of maintenance is a valuable support in hazard identification.

  • 5.
    Holmgren, Mattias
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.
    Maintenance-related losses at the Swedish rail2005Ingår i: Journal of Quality in Maintenance Engineering, ISSN 1355-2511, E-ISSN 1758-7832, Vol. 11, nr 1, s. 5-18Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Purpose - The purpose of this study is to identify maintenance related losses, and their causes, in order to describe different deviations in the maintenance process that contributes to incidents and accidents at the Swedish Railway. Design/methodology/approach - In this paper incident and accident reports from 666 derailments and collisions at the Swedish Railway during 1988-2000, stored in a national database, are studied with respect to possible maintenance related causes. Findings - The railway is a complex technical system used for both freight and passenger transportation. Maintenance is one way to achieve safety and dependability of the railway. However, at the same time badly performed maintenance may also cause accidents. The study shows that maintenance related causes represent 30 percent of all rail and track related incidents and accidents represented in the database. About 80 percent of the maintenance related accidents happen during the execution phase. The most common cause of maintenance related accidents is imperfect communication and information between the maintenance personnel and the operators. Rule violations, especially lack of permission to perform maintenance work on the track, are the second most frequent causes. Originality/value - Identifies maintenance related losses, and their causes, on Swedish railways but is of value to all concerned with transport maintenance and safety.

  • 6.
    Holmgren, Mattias
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.
    Maintenance related losses: a study at the Swedish National Rail Administration2003Licentiatavhandling, sammanläggning (Övrigt vetenskapligt)
    Abstract [sv]

    Den globala konkurrensen ställer allt högre krav på driftsäkerhet och säkerhet hos produktionssystemen. Den normala driften av systemet leder till en gradvis försämring av dess status p.g.a. slitage, smuts, korrosion och överbelastning. Utförande av underhåll är ett sätt att säkerställa systemets driftsäkerhet och säkerhet. Även om underhåll genomförs för att öka säkerheten kan dock felaktigt eller uteblivet utfört underhåll reducera systemets säkerhet och skapa förluster genom incidenter och olyckor.Syftet med denna studie är att identifiera, klassificera och analysera underhållsrelaterade incidenter och olyckor. Resultatet ska kunna användas för att bättre styra underhållsentreprenader och därigenom säkerställa säkerheten för passagerare och personal vid Banverket och därigenom vara en del av deras ständiga förbättringsarbete. För att uppfylla syftet har en databasstudie och en litteraturstudie genomförts. Databasstudien fokuserades på incidenter och olyckor vid den Svenska järnvägen. Studiens resultat kan delas upp i två delar. Den första delen är en analysmodell, som används för databasstudien. Denna modell beskriver orsakskedjan från bristande styrning till förluster, vilka manifesteras i incidenter och olyckor. Den andra delen, vilken baseras på empiri, är en klassificering av incidenter och olyckor vid den Svenska järnvägen. Underhållsrelaterade incidenter och olyckor klassificeras och analyseras. De primära orsakerna till dessa incidenter och olyckor bestäms och diskuteras. Ungefär 30% av de spårrelaterade incidenterna och olyckorna orsakas av bristfälligt utfört underhåll. Andra bidragande orsaker är bristande kommunikation och regelbrott.

  • 7.
    Holmgren, Mattias
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.
    Maintenance related risks: Do they need any further investigation2002Konferensbidrag (Refereegranskat)
    Abstract [en]

    The purpose of maintenance is to ensure safety and dependability of a system. The maintenance personnel perform different maintenance activities. In Sweden there exist regulations, to some extent covering maintenance and operation of technical systems. The purpose of these regulations is to reduce the risk for the humans, the environment and the property. Still, many accidents occur in connection with maintenance or service. Reasons for this are, e.g., that procedures are not followed, proper training is lacking, or the maintainability of the system is poor.In an ongoing study at the Centre for Dependability and Maintenance at Luleå University of Technology, a number of company representatives are interviewed and incident reports and accident investigations from a number of different papers and scientific reports are studied with respect to possible maintenance related causes and corresponding effects. The purpose of this study is to perform an investigation in order to answer the question: Do maintenance related risks need further investigation? In this paper some preliminary findings will be presented.

  • 8.
    Holmgren, Mattias
    et al.
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.
    Akersten, Per-Anders
    The maintenance process: looked upon through risk glasses2002Ingår i: Proceedings of the 16th European Maintenance Congress: Euromaintenance 2002, 2002, s. 267-273Konferensbidrag (Refereegranskat)
1 - 8 av 8
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