In this paper, dynamic aspects of railway infrastructure operation and maintenance costs in Sweden are explored. Econometric cost functions are estimated to check the robustness of previous marginal cost estimates by introducing lags and leads of both dependent and independent variables. We find support for a forward-looking behaviour within the Swedish National Rail Administration (Banverket) ...

Case studies were conducted using a stochastic model to predict the life cycle cost impact associated with the application of prognostic health management (PHM) to helicopter avionics. The life cycle costs of systems that assumed unscheduled maintenance and fixed-interval scheduled maintenance were compared to the costs of precursor-to-failure and life consumption monitoring PHM approaches, and...

Maintenance is a source of large costs; in the EU the maintenance costs amount to between 4% and 8% of the total sales turnover. Opportunistic maintenance is an attempt to lower the maintenance cost by considering the failure of one component as an opportunity to replace yet non-failed components in order to prevent future failures. At the time of failure of one component, a decision is to be m...

In this paper, we focus on a continuously deteriorating critical equipment which its failure cannot be measured by cost criterion. For these types of systems like military systems, nuclear systems, etc it is extremely important to avoid failure during the actual operation of the system. In this paper we propose an approach which constrains failure probability to a pre-specified value. This valu...

In case of leasing, the user rents equipment for a predetermined time. During this period, all maintenance actions are performed by the lessor. In this research paper, the aim consists to determine an optimal maintenance policy for ensuring a minimum reliability, required by the customer. Two strategies are proposed: the first consists to perform preventive actions whenever the system reliabili...

We address efficient planning of maintenance activities in infrastructural networks, inspired by the real-world problem of servicing a highway network. A road authority is responsible for the quality, throughput and maintenance costs of the network, while the actual maintenance is performed by autonomous, third-party contractors. From a (multi-agent) planning and scheduling perspective, many in...