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 ?