Leen Vooijs
Implementing risk basedmaintenance concepts.
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Present situation
in the Netherlands
More preventivemaintenance
Decreasingknowledge
Lack ofinformation
Output MaintenanceContracts
Maintenance manager
Lack of Budget
PerformancecontractTOC’s
35-40 % lessfailures in 2005
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Maintenance manager
What will be the cost of a better
performance?
Why is maintenance so
expensive?
How do we ensure the contracted
performance?
What are the effects of cutting budgets?
What are the best actions to be taken to
improve performance?
What do we have to pay for 1%
more availability?
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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 ?
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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.
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Model
Object
Maintenanceconcept
Failure mode
Statistical information
Company objectivesCauses
Effect
Criticality analysis
Preventiveactivities
Repairactivities
Using the FMECA.
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Simulation and results (prediction)
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Comparingscenario's
WithoutPreventivemaintenance:
WithPreventivemaintenance:
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Pointing critical installations/components
4322Light
164Casing
21664Cable
Risk (Availability)
Risk(cost)
Object /part
Setting of inspection frequencies
When preventive maintenance has to be done
0
Condition (t) %
t
100
0
f(t)
t
μ = MTTF
μ = MTTF
Moment a disturbance occurs.
80
Lead-TimeActual Optimizer
When modification of components/installations will be effective
Supports maintenance engineer in:
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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.
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Relation with contractors (1).
ProRailPerformance specifications
Defining necessary activities
ContractorExecution of activities
Performance results
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:
• And risk based maintenance concepts will be the common language.
• MAINTENANCE ENGINEERING.
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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.
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Thank you for your attention
Any questions ?