| 1. |
- Baas, Leo
(författare)
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Dissemination Models for Cleaner Production and Industrial Ecology
- 2005
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Ingår i: International Journal of Performability Engineering. - : RAMS Consultants. - 0973-1318. ; 1:1, s. 89-99
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Tidskriftsartikel (refereegranskat)abstract
- Cleaner Production and Industrial Ecology are challenging new preventive concepts that can improve the environmental and economic performance of industry. In this paper, the author sketches the conditions to challenge the experienced reluctance to change routines in many dissemination projects of these concepts. Organizational learning processes are needed to go beyond limited results such as some good housekeeping practices and waste exchange links.A dilemma for the dissemination of new concepts in general is that pilot studies never meet the full conditions that are needed. The disseminator is often restricted through resistance to change and many organisational management obstacles. The organisation that is willing to co-operate with an assessment, is often not really interested in the implementation of the results. The funds for research are bounded to the limits of the vision of the funding public or private organisations.In this article a change process that might generate more radical approaches, is promoted. The steps of this dissemination process within and between organizations are: 1. Bringing information about a new concept for the start of a process of awareness-raising and commitment building; 2. After that, educating the concept to provide the knowledge for the assessments of the concept and strategic discussions in interaction processes with the key-actorswithin and between organizations to generate a basis for implementation; 3. Evaluating the learning processes to stimulate continuous improvement programmes; 4. The above-mentioned actions can be better embedded in organizations when asurroundings and an organizational analysis for the dissemination of the new concept is performed and the results are included in the approach.
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| 2. |
- Barabady, Javad, et al.
(författare)
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Reliability Characteristics Based Maintenance Scheduling: A Case Study of a Crushing Plant
- 2007
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Ingår i: International Journal of Performability Engineering. - : RAMS Consultants. - 0973-1318. ; 3:3, s. 319-328
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Tidskriftsartikel (refereegranskat)abstract
- The cost of maintenance is too high in mining industry to ignore. This is mainly due to poor understanding of the maintenance process which is greatly influenced by the reliability characteristics of the operating system. The paper introduces an approach for maintenance scheduling of a mining system based on reliability analysis which is divided into two parts. The first part introduces a methodology for optimal maintenance scheduling based on analysis of maintenance data in the form of time-between-failure and time-to-repair distributions. In the second part, we present a case study from Jajarm Bauxite Mine in Iran to illustrate the applicability of the maintenance scheduling model.
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| 3. |
- Chattopadhyay, Gopi, et al.
(författare)
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Parameter estimation for rail degradation model
- 2009
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Ingår i: International Journal of Performability Engineering. - 0973-1318. ; 5:2, s. 119-130
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Tidskriftsartikel (refereegranskat)abstract
- Wear and fatigue in rails are major contributors of rail degradation depending on operational conditions, track, characteristics of bogie type, Million Gross Tonnes (MGT), curvature, traffic type and environmental conditions. Estimation of parameter for failure models is necessary for accurate prediction of expected number of rail defects over a period of time based on MGT of traffic and operating conditions for developing cost effective maintenance strategies. This paper focuses on collection and analysis of field data over a period of time for estimation of parameter for modelling rail life.
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| 4. |
- Ghodrati, Behzad
(författare)
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Weibull and exponential renewal models in spare parts estimation: A comparison
- 2006
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Ingår i: International Journal of Performability Engineering. - : RAMS Consultants. - 0973-1318. ; 2:2, s. 135-147
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Tidskriftsartikel (refereegranskat)abstract
- Providing the required spare parts is an important issue of product support, which is important for system/machine utility improvement. Required spare parts estimation can be performed through different approaches, one of the realistic and well-founded spare parts estimation method is based on the system's reliability characteristics and taking into consideration the system operating environment. In this paper we study and compare two renewal models namely exponential and Weibull models (constant versus non-constant failure rate assumptions) used in estimation of spare parts for non-repairable components. We also estimate the differences between the two models and calculate the percentage of error. Furthermore a case study is conducted on the hydraulic system of LHD machines in Kiruna Mine in Sweden to find out which factor has a significant impact on the estimation of the number of required spare parts.
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| 5. |
- Kumar, Uday
(författare)
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Guest editorial
- 2008
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Ingår i: International Journal of Performability Engineering. - : RAMS Consultants. - 0973-1318. ; 4:3, s. 203-204
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)
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| 6. |
- Niska, Stefan
(författare)
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Electromagnetic Interference: A major Source of Faults in Swedish Railway
- 2009
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Ingår i: International Journal of Performability Engineering. - : RAMS Consultants. - 0973-1318. ; 5:2, s. 187-196
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Tidskriftsartikel (refereegranskat)abstract
- Industry and the railway sector are at present entering a new era. Increasingly, the systems in operation today use electronic components instead of relay technique and the railway sector now has the opportunity to improve current systems. However when new technology is installed into old infrastructure, new knowledge has to be taken into consideration. The new technology which is to be integrated into old systems or which is to be applied when building systems from scratch should meet the requirements for electromagnetic compatibility to fit into the infrastructure. To see whether there are any problems in this area, an investigation has been performed based on the failure reporting system used by Banverket (Swedish Rail Administration). Visual inspection has been carried out in the signal and detector boxes located close to the track. Measurements on site have been conducted to follow up the investigation into the failure reporting system and the visual inspections.
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| 7. |
- Nyström, Birre
(författare)
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Use of availability concepts in the railway system
- 2009
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Ingår i: International Journal of Performability Engineering. - 0973-1318. ; 5:2, s. 103-118
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Tidskriftsartikel (refereegranskat)abstract
- This paper explores and describes indicators related to availability in the railway system. Examples of indicators include train punctuality and condition of track. The paper presents losses to the stakeholders, measured by the indicators. Indicators in Banverket (Swedish Rail Administration) and railway literature are presented. Indicators used in the electric power industry are also presented, as these offer good analogies from which to develop additional railway indicators. The indicators found in the literature, but not in Banverket, include travel time variation, slack and wagons. Indicators found by analogy to the power industry concern passengers, traffic work not delivered and how to subtract the effects of adverse weather. A classification of availability indicators is also suggested.
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| 8. |
- Rezvanizaniani, S.M., et al.
(författare)
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Reliability analysis of the rolling stock industry : a case study
- 2009
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Ingår i: International Journal of Performability Engineering. - : RAMS Consultants. - 0973-1318. ; 5:2, s. 167-175
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Tidskriftsartikel (refereegranskat)abstract
- Provision of reliable rolling stock and infrastructure equipment is an important part in achieving high levels of safety. Therefore, the railway industry uses different methods and tools to improve the performance of different subsystems in order to ensure safety and reliability, which are the important factors for passengers and cargo transportation. Hence, reliability analysis is required to identify the bottlenecks in the system and find the components or subsystems with low reliability for a desired level of performance. This paper focuses on collection and analysis of field failure data over a period in Raja Passenger Train Company of Iran. The results of data analysis show that wheel sets is the bottleneck, and it utilizes the historical data of wheel sets to determine the reliability function. Thereafter, the reliability of each type of wheel sets are identified over different time intervals and which can be used to determine the appropriate time of preventive maintenance tasks.
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