Efficient Maintenance Strategy Through
System Dynamics
Author(s)
T. Böhm, K. Beck, A. Knaak & B. Jäger
Abstract
In times when economic efficiency of traffic systems is getting more and more
important, it is necessary to have an efficient maintenance strategy, because
maintenance costs have been identified as significant cost drivers. This holds
true especially for railway signalling in which the long life cycle of elements has
a high impact on the costs. In addition, a maintenance strategy is required to
fulfil the high standards for availability and safety in the railway sector. While
different strategies are available (e.g. corrective or preventive, predetermined or
condition based, etc.), each strategy has various options of processed period,
duration, costs, impact on the maintained item, etc. This makes it a difficult task
to find an efficient maintenance strategy for a system or even a network. The
Institute of Transportation Systems has therefore analysed cause-and-effect
chains between system condition, availability, maintenance activities, and costs.
The identified cause-and-effect chains are modelled with the use of System
Dynamics. System Dynamics is a method which has established to analyse and
model complex dynamic systems. The developed models do not only enable the
user to compare the efficiency of different maintenance activities with each
other, but also provide the possibility to determine a combination of these
activities leading to an overall system maintenance strategy at a cost minimum
through optimisation. This allows infrastructure managers to evaluate their
current maintenance program and to determine an economically improved
strategy for the future.
Keywords: LCC, railway signalling, condition based maintenance, System
Dynamics, decision support system.
Keywords
LCC, railway signalling, condition based maintenance, System
Dynamics, decision support system.
Related Book
Other papers in this volume
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