RA Engineering - Balfour Beatty Rail

”What does RA Engineering mean?“The RA Engineering ensures a RAMS-true completion ofproject design, construction and engineering. Activitieslay emphasis on the fields reliability and availability.RA Engineering understands all measures to be taken toguarantee this objective. Such as preventive measuresto decrease the probability of a failure state, protectivemeasures to diminish the extend of the effects of afailure state and descriptive measures (as specifications)for documentation, understanding and evidence.Detailed data on activities to be performed in each lifecycle phase for verification and validation and activitiesto specify demands and objectives are described byEN 50 126. Pursuant to this standard, the scope andcharacteristics of demands are identified for individualprojects and adjusted to the specific circumstances ofthe product in question.RA Engineering represents the consequent fulfilmentof the RAMS requirements.Some important terms:Failure: Ending of a unit ability to fulfil a requiredfunction.Failure rate: Simplified: The probability that afailure of a product will occur within a presetmonitored period of time (failures per time).Mean time between failures (MTBF):The MTBF is the assumed value of distribution ofoperating periods between two consecutivefailures. It can be evaluated from a sufficiently largerandom sample as the arithmetical average value ofoperating periods between the recorded failures.Malfunction: State of a unit characterised by itsinability to fulfil a required function.Restoration: The part of the corrective maintenancewhere activities are performed in order to restore therequired function of the unit.Restoration time: Part of the corrective maintenancetime during which restoration activitiesare performed on one unit.Mean time to restoration (MTTR): The MTTR isthe assumed value of the restoration period. It canbe evaluated from a sufficiently large random sampleas an arithmetical average value.Corrective maintenance time: Part of the maintenanceperiod of time during which corrective maintenanceactivities are performed on a unit, includingthe duration of the technical and logistical delayassociated with corrective maintenance.03