Optimizing inspection intervals—Reliability and availability in terms of a cost model: A case study on railway carriers

Wolde, Mike ten; Ghobbar, Adel A.

doi:10.1016/j.ress.2012.12.013

Cited by 42 publications

(19 citation statements)

References 15 publications

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“…Furthermore, whereas Ten Wolde and Ghobbar [15] for example state that increasing the inspection frequency increases the chance that a potential failure will be identified so that the additional cost (of more inspections) leads to improved reliability, this condition is not the case when the consequence of a false positive inspection is the possible replacement of a strong component by a weak one (Berrade et al [13]). Therefore, in our view, it is necessary to consider both cost and system reliability when analyzing the effect of inspection errors and low quality maintenance on inspection policy, and we do so in our paper here.…”

Section: Abbreviationsmentioning

confidence: 99%

Some Insights Into the Effect of Maintenance Quality for a Protection System

2015

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This paper considers an inspection and preventive replacement policy for a one-component protection or cold standby system. Inspection is imperfect, and subject to false positives and negatives; preventive replacement may also be of poor quality. We determine conditions relating to the quality of the inspection and preventive replacement under which a maintained system would not benefit from the execution of inspections and preventive maintenance. We present examples with decreasing failure rate component lifetimes in which preventive replacement is cost-optimal, contrary to the classic policy. Such cases arise when inspections do not necessarily detect the failed state.

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Section: Abbreviationsmentioning

confidence: 99%

Some Insights Into the Effect of Maintenance Quality for a Protection System

2015

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“…Macke [53] optimised maintenance intervals using cost-benefit criteria for deteriorating structures. Wolde and Ghobbar [54] created a model that adjusts the inspection intervals, depending on the actual reliability of the system for optimum cost and availability for a railway carriage maintenance company. The policy of maintenance can be predefined as preventive, corrective or as a selective maintenance operation, i.e.…”

Section: Reliability Centred Maintenancementioning

confidence: 99%

Development and application of a value driven design assessment framework to an unmanned air system design

Papageorgiou

2018

2018 Advances in Science and Engineering Technology International Conferences (ASET)

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The work presented in this thesis concerns the development of a value driven engineering design assessment framework and its application to the conceptual design of an Unmanned Air System (UAS) to be utilised in a defence application. This research demonstrates the implementation of the value driven design philosophy in this framework, identifying value enhancing designs, with value not converted to monetary worth and as perceived by all stakeholders involved. A multi-criteria and multi-stakeholder decision making analysis is adopted to address their preferences as well as to study their interacting strategic choices. The ultimate objective of this framework is to convert engineering design to a decision making analysis with multiple conflicting objectives of multiple stakeholders considered.This framework is capable of providing a product definition and estimation of all performance and cost related attributes for the conceptual phase. However, instead of pertaining to a single aircraft concept, a broad range of combinations of UAS configurations and geometries is generated by systematically searching alternative concepts and design configurations through a novel parameterization of the aircraft geometric topologies.Value, related to the designed system's capabilities or performance and lifecycle cost, is used to compare different alternatives in the decision making of engineering design through the appropriate value model. Following a valuefocused approach, a novel multi-attribute value model is introduced for objectively capturing the stakeholder's preferences and expectations. Furthermore, a more sophisticated multi-attribute utility model, based on standard Multi-attribute Utility Theory, is employed in the evaluation.Game Theory as an optimization tool is used to develop a novel hybrid cooperative/non-cooperative non-zero sum, complete information game among all involved stakeholders as players. This game successfully addresses the stakeholders' preferences in a functional outcome-focused way, resolving the high indeterminacy of the alternative designs through a cooperative game. At the same time, their strategic interactions are captured in a process-focused non-cooperative game. Hence, the optimal design is identified through the simultaneous employment of the Nash bargaining solution and the Nash equilibrium.i

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“…At present it is applied in many industrial sectors, e.g. aircraft, armament, power, processing and transportation industries [14,19,29,38,50,55,59]. …”

Section: Ram Analysismentioning

confidence: 99%

Diesel locomotive efficiency and reliability improvement as a result of power unit load control system modernisation

Babeł¹,

Szkoda²

2016

EiN

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Diesel locomotive efficiency anD reliability improvement as a result of power unit loaD control system moDernisation poprawa efektywności i niezawoDności lokomotyw spalinowych w wyniku moDernizacji ukłaDu sterowania obciążeniem zespołu napęDowego* BABeł M, SzkodA M. diesel locomotive efficiency and reliability improvement as a result of power unit load control system modernisation. eksploatacja i Niezawodnosc -Maintenance and Reliability 2016; 18 (1): 38-49, http://dx

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Optimizing inspection intervals—Reliability and availability in terms of a cost model: A case study on railway carriers

Cited by 42 publications

References 15 publications

Some Insights Into the Effect of Maintenance Quality for a Protection System

Some Insights Into the Effect of Maintenance Quality for a Protection System

Development and application of a value driven design assessment framework to an unmanned air system design

Diesel locomotive efficiency and reliability improvement as a result of power unit load control system modernisation

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