Zielwertbasierte Steuerung von Instandhaltungsmengen der Fahrbahn.

An efficient and pragmatic management of the amount of maintenance requires suitable performance indicators. The aim is to reduce the available information as much as possible, but only as much as needed. These performance indicators must depict all damage types and their rectification methods. To constitute a complete causal indicator system their interaction has to be modelled. Costs, availability as well as safety risks can be contained as long as maintenance intervention takes place early in the damage cycle. A residual risk remains in case a comprehensive monitoring over time of all state variables on assets cannot be ensured. In addition, a potentially non-reliable damage prediction would limit early intervention. This will lead to a self-reinforcing trend of damage progression and applicable maintenance levels: From a deviation to a failure, from preventive maintenance to troubleshooting. This paper introduces an approach to verify and control the amount of maintenance by target based performance indicators. The model takes into account the interaction between damage progression and rectification method. The Asset Management of Swiss Federal Railways aspires to implement such an approach to support its data based monitoring of track systems. In addition, a description of a self-adjusting control loop is given. The loop controls the amount of maintenance according to defined target values. In general according target values can be chosen freely. However, they should be determined by optimal cost effectiveness of the system as a whole under consideration of the acceptable risk in the individual case. This approach ensures the achievement of management objectives particularly in view of increasing demands or new regulations on assets. [ABSTRACT FROM AUTHOR]