QUANTIFIED RAMS BASED RAILWAY ASSET MANAGEMENT
Rail Asset
Railway Asset Management provides Sustainable Infrastructures through evidence-based decision making to achieve the optimum performance with Economic benefit while ensuring Safety and Integrity. It covers defining Asset Management Policy, Strategy and Framework. Key factors to consider are the physical deterioration, obsolescence, operation and maintenance of the system. Corrective Actions are based on management Data Reviews.
Asset Managers must perform
Risk Analysis and Predictive
Analysis for Maintenance planning.
In addition, a Qualitative
Vulnerability Analysis and
Managerial Oversight Risk Analysis
should be performed to evaluate
System Safety Robustness.
After defining the System
Reliability, Reliability Allocation
to sub-systems are fixed and various
Design and Manufacture criterions
are followed with trade-off between
Performance and Service life-cycle
Cost. Failure probabilities are
calculated after Mitigation of
critical Failure Modes. Cost models
on maintenance optimization can be
based on Markov model with
Inspection and Replacement policy.
Incentive on improved Reliability
and Supply of specific Reliability
Data for the Equipment must be
implied in Supply Contract,
considering other performance
aspects.
Acceptance
Testing should comply with
Reliability Targets and specify
Accelerated Stress Test Duration,
including Burn-in periods, if any.
Maximum Likelihood Estimation for
Failure is calculated before Asset
acceptance.
While
increasing Reliability, Preventive
Maintenance reduces Availability and
might introduce new failures. So,
Predictive Maintenance using
Diagnostics and Prognostics is a
better Option. Comparisons between
Repair and Renewal are chosen to
maximize Availability.
MTTR must comply with 95%
Confidence that Repairs are
performed within defined duration.
Optimum Inspection Interval must be
calculated from Failure Rates,
Inspection duration and Repair time.
Adequacy of Spare Parts and Location
of Stores, whether Centralized or
Distributed, are to be specified
after calculations to provide
maximum Availability.
Reliability Growth testing
must be done to verify stipulated
MTTF.
To avoid any lapse
during On-site Maintenance
Activities due to Human Errors,
specific Checklists, Maintenance
Tools and, Drawings must be
available. Proper updated Training
is mandatory for the Concerned
men-at-site. Cloud-based Intelligent
Safety Asset Management can
implement Expert Systems, Video
Conferencing with Experts during
emergency and Video Surveillance of
Construction Sites.
Finally, Asset Management
Audits check whether the specified
strategies are being
followed.
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