All Outputs (75)

A modelling approach for railway overhead line equipment asset management (2017)
Journal Article
Kilsby, P., Remenyte-Prescott, R., & Andrews, J. (2017). A modelling approach for railway overhead line equipment asset management. Reliability Engineering and System Safety, 168, 326-337. https://doi.org/10.1016/j.ress.2017.02.012

© 2017 Elsevier Ltd The Overhead Line Equipment (OLE) is a critical sub-system of the 25 kV AC overhead railway electrification system. If OLE asset management strategies can be evaluated using a whole lifecycle cost analysis that considers degradati... Read More about A modelling approach for railway overhead line equipment asset management.

System design and maintenance modelling for safety in extended life operation (2017)
Journal Article
Andrews, J., & Fecarotti, C. (in press). System design and maintenance modelling for safety in extended life operation. Reliability Engineering and System Safety, 163, https://doi.org/10.1016/j.ress.2017.01.024

It is frequently the most cost effective option to operate systems and infrastructure over an extended life period rather than enter a new build programme. The condition and performance of existing systems operated beyond their originally intended de... Read More about System design and maintenance modelling for safety in extended life operation.

An information theoretic approach for knowledge representation using Petri nets (2016)
Presentation / Conference Contribution
Chiachío, M., Chiachío, J., Prescott, D., & Andrews, J. (2016). An information theoretic approach for knowledge representation using Petri nets.

A new hybrid approach for Petri nets (PNs) is proposed in this paper by combining the PNs principles with the foundations of information theory for knowledge representation. The resulting PNs have been named Plausible Petri nets (PPNs) mainly because... Read More about An information theoretic approach for knowledge representation using Petri nets.

A Petri net approach for performance modelling of polymer electrolyte membrane fuel cell systems (2016)
Journal Article
Fecarotti, C., Andrews, J., & Chen, R. (2016). A Petri net approach for performance modelling of polymer electrolyte membrane fuel cell systems. International Journal of Hydrogen Energy, 41(28), 12242-12260. https://doi.org/10.1016/j.ijhydene.2016.05.138

© 2016 The Authors Fuel cells are promising technologies for zero-emission energy conversion and power generation. However, durability and reliability are among the main barriers to their commercialisation. Clearly the system performance depends on t... Read More about A Petri net approach for performance modelling of polymer electrolyte membrane fuel cell systems.

Road maintenance planning using network flow modelling (2015)
Journal Article
Yang, C., Remenyte-Prescott, R., & Andrews, J. (in press). Road maintenance planning using network flow modelling. IMA Journal of Management Mathematics, https://doi.org/10.1093/imaman/dpv031

This paper presents a road maintenance planning model that can be used to balance out maintenance cost and road user cost, since performing road maintenance at night can be convenient for road users but costly for highway agency. Based on the platfor... Read More about Road maintenance planning using network flow modelling.

Application of network traffic flow model to road maintenance (2015)
Journal Article
Yang, C., Remenyte-Prescott, R., & Andrews, J. (2015). Application of network traffic flow model to road maintenance. Proceedings of the ICE - Transport, 168(3), https://doi.org/10.1680/tran.13.00067

The study shows how the evolution of two-way traffic flows on a local highway network can be predicted over time using a network-level traffic flow model (NTFM) to model both urban and motorway road networks. After a brief review of the main principl... Read More about Application of network traffic flow model to road maintenance.

A stochastic model for railway track asset management (2014)
Journal Article
Andrews, J., Prescott, D., & De Rozières, F. (2014). A stochastic model for railway track asset management. Reliability Engineering and System Safety, 130, https://doi.org/10.1016/j.ress.2014.04.021

The determination of the strategy to ensure that the geometry for railway track is kept within acceptable limits, in a cost effective manner, is a complex process. It requires the simultaneous consideration of the activities which govern inspection,... Read More about A stochastic model for railway track asset management.

Road network modelling for maintenance planning (2014)
Presentation / Conference Contribution
Yang, C., Remenyte-Prescott, R., & Andrews, J. (2014). Road network modelling for maintenance planning.

In this paper a novel road network flow model is presented, suitable for modelling both motor-way and urban roads. A road network is modelled using a directed graph, consisting of typical roads and junctions, with different traffic flow inputs throug... Read More about Road network modelling for maintenance planning.

A Petri net approach to fault verification in phased mission systems using the standard deviation technique (2014)
Journal Article
Lloyd, M. D., Andrews, J., Remenyte-Prescott, R., Pearson, J. T., & Hubbard, P. (2014). A Petri net approach to fault verification in phased mission systems using the standard deviation technique. Quality and Reliability Engineering International, 30(1), https://doi.org/10.1002/qre.1478

Health management systems are now standard aspects of complex systems. They monitor the behaviour
of components and sub-systems and in the event of unexpected system behaviour diagnose faults that
have occurred. Although this process should reduce... Read More about A Petri net approach to fault verification in phased mission systems using the standard deviation technique.

A network traffic flow model for motorway and urban highways (2013)
Journal Article
Yang, C., Remenyte-Prescott, R., & Andrews, J. (2014). A network traffic flow model for motorway and urban highways. Journal of the Operational Research Society, 65(8), https://doi.org/10.1057/jors.2013.86

The research reported in this paper develops a network level traffic flow model (NTFM) which is applicable for both motorway and urban roads. It forecasts the traffic flow rates, queue propagation at the junctions and travel delays through the networ... Read More about A network traffic flow model for motorway and urban highways.

Fault propagation modelling for fluid system health monitoring (2011)
Journal Article
Remenyte-Prescott, R., & Andrews, J. (2011). Fault propagation modelling for fluid system health monitoring. International Journal of Performability Engineering, 7(11),

Fault diagnostics systems are incorporated to determine the health of the system they monitor. There are however times when the diagnostics system reports faults which do not exist. This situation commonly arises at system start-up when high vibrat... Read More about Fault propagation modelling for fluid system health monitoring.

An efficient phased mission reliability analysis for autonomous vehicles (2010)
Journal Article
Remenyte-Prescott, R., Andrews, J., & Chung, P. (2010). An efficient phased mission reliability analysis for autonomous vehicles. Reliability Engineering and System Safety, 95(3), https://doi.org/10.1016/j.ress.2009.10.002

Autonomous systems are becoming more commonly used, especially in hazardous situations. Such systems are expected to make their own decisions about future actions when some capabilities degrade due to failures of their subsystems. Such decisions are... Read More about An efficient phased mission reliability analysis for autonomous vehicles.

An efficient real-time method of analysis for non-coherent fault trees (2009)
Journal Article
Remenyte-Prescott, R., & Andrews, J. (2009). An efficient real-time method of analysis for non-coherent fault trees. Quality and Reliability Engineering International, 25(2), https://doi.org/10.1002/qre.955

Fault tree analysis is commonly used to assess the reliability of potentially hazardous industrial systems. The type of logic is usually restricted to AND and OR gates which makes the fault tree structure coherent. In non-coherent structures not only... Read More about An efficient real-time method of analysis for non-coherent fault trees.

An enhanced component connection method for conversion of fault trees to binary decision diagrams (2008)
Journal Article
Remenyte-Prescott, R., & Andrews, J. (2008). An enhanced component connection method for conversion of fault trees to binary decision diagrams. Reliability Engineering and System Safety, 93(10), https://doi.org/10.1016/j.ress.2007.09.001

Fault Tree Analysis (FTA) is widely applied to assess the failure probability of industrial systems. Many computer packages are available which are based on conventional Kinetic Tree Theory methods. When dealing with large (possibly non-coherent) fau... Read More about An enhanced component connection method for conversion of fault trees to binary decision diagrams.

Analysis of non-coherent fault trees using ternary decision diagrams (2008)
Journal Article
Remenyte-Prescott, R., & Andrews, J. (2008). Analysis of non-coherent fault trees using ternary decision diagrams. Proceedings of the Institution of Mechanical Engineers, Part O: Journal of Risk and Reliability, 222(2), https://doi.org/10.1243/1748006XJRR154

Risk and safety assessments performed on potentially hazardous industrial systems commonly utilise Fault Tree Analysis (FTA) to forecast the probability of system failure. The type of logic for the top event is usually limited to AND and OR gates whi... Read More about Analysis of non-coherent fault trees using ternary decision diagrams.

Prime implicants for modularised non-coherent fault trees using binary decision diagrams (2007)
Journal Article
Remenyte-Prescott, R., & Andrews, J. (2007). Prime implicants for modularised non-coherent fault trees using binary decision diagrams. International Journal of Reliability and Safety, 1(4), https://doi.org/10.1504/IJRS.2007.016259

This paper presents an extended strategy for the analysis of complex fault trees. The method utilises simplification rules, which are applied to the fault tree to reduce it to a series of smaller subtrees, whose solution is equivalent to the original... Read More about Prime implicants for modularised non-coherent fault trees using binary decision diagrams.

Qualitative analysis of complex modularized fault trees using binary decision diagrams (2006)
Journal Article
Remenyte-Prescott, R., & Andrews, J. (2006). Qualitative analysis of complex modularized fault trees using binary decision diagrams. Proceedings of the Institution of Mechanical Engineers, Part O: Journal of Risk and Reliability, 220(1), https://doi.org/10.1243/1748006XJRR10

Fault tree analysis is commonly used in the reliability assessment of industrial systems. When complex systems are studied conventional methods can become computationally intensive and require the use of approximations. This leads to inaccuracies in... Read More about Qualitative analysis of complex modularized fault trees using binary decision diagrams.

Analysing the impact of local factors on the life cycle of metallic bridge girders
Presentation / Conference Contribution
Calvert, G., Hamer, M., Neves, L., & Andrews, J. (2023, July). Analysing the impact of local factors on the life cycle of metallic bridge girders. Presented at Eighth International Symposium on Life-Cycle Civil Engineering (IALCCE 2023), Milan, Italy

A fundamental component of a life cycle analysis of a bridge is the modelling of asset condition post-construction. To enhance the accuracy of bridge deterioration models, several studies have calibrated models based on cohorts that incorporate struc... Read More about Analysing the impact of local factors on the life cycle of metallic bridge girders.

Producing effective maintenance strategies to control railway risk
Presentation / Conference Contribution
Fecarotti, C., & Andrews, J. (2018, September). Producing effective maintenance strategies to control railway risk. Presented at PSAM 14 Probabilistic Safety Assessment and Management, Los Angeles, California, USA

This paper describes the main features of a modelling framework that sets out a systematic approach to railway infrastructure asset management enabling decisions to be made based not only on costs but on service performance and safety. First, the fra... Read More about Producing effective maintenance strategies to control railway risk.

A Petri Net approach to the Risk Analysis of Jet Engines
Presentation / Conference Contribution
Tolo, S., Andrews, J., Thatcher, I., & Stamp, D. (2022, August). A Petri Net approach to the Risk Analysis of Jet Engines. Presented at 32nd European Safety and Reliability Conference (ESREL 2022), Dublin, Ireland

Traditional risk analysis techniques such as Fault Trees and Event Trees fail to model complex aspects of systems behaviour such as components dependencies, degradation, limiting their capability of representing modern engineering systems. This is al... Read More about A Petri Net approach to the Risk Analysis of Jet Engines.