Implementing risk based
maintenance concepts.
Leen Vooijs
Performance
contract
TOC’s
Lack of
Budget
35-40 % less
failures in 2005
Present situation
in the Netherlands
More preventive
maintenance
Maintenance manager
Output
Maintenance
Contracts
ProRail - ambities in railinfra /
Decreasing
knowledge
Lack of
information
2
What will be the cost
of a better
performance?
How do we ensure the
contracted
performance?
Why is
maintenance so
expensive?
What are the effects
of cutting budgets?
What do we have
to pay for 1%
more availability?
What are the best
actions to be taken to
improve performance?
Maintenance manager
ProRail - ambities in railinfra /
3
Essence of these questions:
 What is the (quantitative) relation
between maintenance(cost) as input and
performance of infrastructure as output ?
 And how to manage this relation ?
ProRail - ambities in railinfra /
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How to answer that question?
 Looking for a systematic approach to link
maintenance activities to performance.
 Based on risks
 Usable for evaluation and planning.
ProRail - ambities in railinfra /
5
Using the FMECA.
Object
Failure mode
Causes
Effect
Criticality analysis
Preventive
activities
Repair
activities
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Maintenance
concept
Model
6
Simulation and
results (prediction)
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Comparing
scenario's
Without
Preventive
maintenance:
With
Preventive
maintenance:
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Supports maintenance engineer in:
 Pointing critical installations/components
 Setting of inspection frequencies
 When preventive maintenance has to be done
Object / of components/installations
Risk
Risk
 When modification
part
(cost)
(Availability)
will be effective
Moment a disturbance occurs.
Condition (t) %
100
80
Cable
Casing
Light
ProRail - ambities in railinfra /
0
f(t)
0
64
64
2
Lead-Time
Actual Optimizer
216
1
432
t
t
μ = MTTF
μ = MTTF
9
Year activity proposal
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Basis for activities.
 Rules and regulations will be based on risks.
 Proposals for modification of installations,
methods of regulation will be based on
analysis of risks referring to usage.
Effect: the risks and the effects are subject
of discussion, not the activities itself.
ProRail - ambities in railinfra /
11
Relation with contractors (1).
Performance specifications
ProRail
Defining necessary activities
Execution of activities
Performance results
ProRail - ambities in railinfra /
Contractor
In this area
ProRail and
the contractor
have to
discuss
improvements,
methods and
activities.
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Relation with contractors (2).
• Discussing improvements, methods and
activities is:
• MAINTENANCE ENGINEERING.
• And risk based maintenance concepts will be
the common language.
ProRail - ambities in railinfra /
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Actual status.
 Generic concepts for 18 objects available.
 Maintenance concepts still to be
implemented.
 Discussion about how to use maintenance
concepts in maintenance contracts
 Optimisation to be started.
ProRail - ambities in railinfra /
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Thank you for your attention
Any questions ?
ProRail - ambities in railinfra /
15