A Holistic Approach to Railway Infrastructure Asset Management
Volume 11, Number 2, March 2015 - Paper 1 - pp. 107-120
DOVILE RAMA and JOHN D. ANDREWSNottingham Transportation Engineering Centre Faculty of Engineering, University of Nottingham, University Park Nottingham, NG7 2RD, ENGLAND
(Received on May 08, 2014, revised on September 09.and September 26, 2014)
In the railway industry asset management decisions are focused on the maintenance, enhancement and renewal of assets in order to ensure a required level of dependability and improvement in services at the lowest whole life costs. To achieve these objectives system lifecycle models, rather than individual asset models, offer a greater advantage. The paper presents a modelling approach developed for constructing multi-asset system models to support well-informed railway infrastructure asset management decisions. The models are built using the Petri Net formalism and are analysed by a means of Monte Carlo simulations. A specific example of the railway superstructure model is presented. Its simulation results demonstrate the superiority of the system-wide model against individual asset models in terms of its accuracy in predicting the superstructure (system) performance and information available to support asset management decisions. Furthermore, by using the multi-asset system model interdependencies among maintenance regimes of different assets and different parts of the infrastructure can be modelled.
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