Developing resilience signals for the Dutch railway system
conference paper
A resilience state model for a railway system is proposed consisting of three boundaries putting pressure on the operating state: Safety, Performance (Capacity & Punctuality) and Workload. In order to model the pressure of the boundaries, an additional dimension is added where the slope represents the pressure. By doing so, the model is able to differentiate between internal changes that keep the system in a resilient state or have it move towards brittleness. The resilience state model is also used to develop a quantitative signal model, indicating pressure change of the boundaries. A newly defined resilience signal (RS), a quantitative indication of change in system resilience, can be created with help of the signal model and be used for anticipation during operations. The resulting parametric functions will be evaluated and tuned by empirical testing in further research. Using data from governmental reports on responses to incidents, two empirical cases are worked out using the signal model. The first case shows the correlation between a safety RS and safety risk. The second case analyses a capacity RS and explains the results by the system adapation process through a multi-layer hierarchy.
Topics
TNO Identifier
507257
Publisher
Resilience Engineering Association
Source title
Proceedings 5th Symposium on Resilience Engineering, Managing trade-offs; 24th-27th June 2013 Soesterberg, Netherlands
Editor(s)
Herrera, I.
Schraagen, J.M.C.
Vorm, J. van der
Woods, D.D.
Schraagen, J.M.C.
Vorm, J. van der
Woods, D.D.
Place of publication
Sophia Antipolis, F
Pages
191-196