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• Failure_rate abstract "Failure rate is the frequency with which an engineered system or component fails, expressed, for example, in failures per hour. It is often denoted by the Greek letter λ (lambda) and is important in reliability engineering.The failure rate of a system usually depends on time, with the rate varying over the life cycle of the system. For example, an automobile's failure rate in its fifth year of service may be many times greater than its failure rate during its first year of service. One does not expect to replace an exhaust pipe, overhaul the brakes, or have major transmission problems in a new vehicle.In practice, the mean time between failures (MTBF, 1/λ) is often reported instead of the failure rate. This is valid and useful if the failure rate may be assumed constant – often used for complex units / systems, electronics – and is a general agreement in some reliability standards (Military and Aerospace). It does in this case only relate to the flat region of the bathtub curve, also called the "useful life period". Because of this, it is incorrect to extrapolate MTBF to give an estimate of the service life time of a component, which will typically be much less than suggested by the MTBF due to the much higher failure rates in the "end-of-life wearout" part of the "bathtub curve".The reason for the preferred use for MTBF numbers is that the use of large positive numbers (such as 2000 hours) is more intuitive and easier to remember than very small numbers (such as 0.0005 per hour).The MTBF is an important system parameter in systems where failure rate needs to be managed, in particular for safety systems. The MTBF appears frequently in the engineering design requirements, and governs frequency of required system maintenance and inspections. In special processes called renewal processes, where the time to recover from failure can be neglected and the likelihood of failure remains constant with respect to time, the failure rate is simply the multiplicative inverse of the MTBF (1/λ).A similar ratio used in the transport industries, especially in railways and trucking is "mean distance between failures", a variation which attempts to correlate actual loaded distances to similar reliability needs and practices.Failure rates are important factors in the insurance, finance, commerce and regulatory industries and fundamental to the design of safe systems in a wide variety of applications.".
• Failure_rate thumbnail Exponential_pdf.svg?width=300.
• Failure_rate wikiPageExternalLink basic_profile.cfm?ident_number=53939.
• Failure_rate wikiPageExternalLink FT_Tutorial_HK_050418.pdf.
• Failure_rate wikiPageExternalLink bathtub.html.
• Failure_rate wikiPageExternalLink reliability_availability_basics.htm.
• Failure_rate wikiPageExternalLink section-151.html.
• Failure_rate wikiPageExternalLink mondro_approx.pdf.
• Failure_rate wikiPageExternalLink hottopics22.htm.
• Failure_rate wikiPageID "1336960".
• Failure_rate wikiPageRevisionID "604152451".
• Failure_rate hasPhotoCollection Failure_rate.
• Failure_rate subject Category:Actuarial_science.
• Failure_rate subject Category:Error_measures.
• Failure_rate subject Category:Failure.
• Failure_rate subject Category:Maintenance.
• Failure_rate subject Category:Reliability_engineering.
• Failure_rate subject Category:Statistical_ratios.
• Failure_rate subject Category:Statistical_terminology.
• Failure_rate subject Category:Survival_analysis.
• Failure_rate type Abstraction100002137.
• Failure_rate type Act100030358.
• Failure_rate type Action100037396.
• Failure_rate type Choice100161243.
• Failure_rate type Decision100162632.
• Failure_rate type ErrorMeasures.
• Failure_rate type Event100029378.
• Failure_rate type MagnitudeRelation113815152.
• Failure_rate type Maneuver100168237.
• Failure_rate type Measure100174412.
• Failure_rate type Move100165942.
• Failure_rate type PsychologicalFeature100023100.
• Failure_rate type Ratio113819207.
• Failure_rate type Relation100031921.
• Failure_rate type StatisticalRatios.
• Failure_rate type YagoPermanentlyLocatedEntity.
• Failure_rate comment "Failure rate is the frequency with which an engineered system or component fails, expressed, for example, in failures per hour. It is often denoted by the Greek letter λ (lambda) and is important in reliability engineering.The failure rate of a system usually depends on time, with the rate varying over the life cycle of the system. For example, an automobile's failure rate in its fifth year of service may be many times greater than its failure rate during its first year of service.".
• Failure_rate label "Ausfallrate".
• Failure_rate label "Failure rate".
• Failure_rate label "Função hazard".
• Failure_rate label "Tasso di guasto".
• Failure_rate label "Taux de défaillance".
• Failure_rate label "失效率".
• Failure_rate sameAs Ausfallrate.
• Failure_rate sameAs Hutsegite-tasa.
• Failure_rate sameAs Taux_de_défaillance.
• Failure_rate sameAs Tasso_di_guasto.
• Failure_rate sameAs Função_hazard.
• Failure_rate sameAs m.04tsft.
• Failure_rate sameAs Q2737027.
• Failure_rate sameAs Q2737027.
• Failure_rate sameAs Failure_rate.
• Failure_rate wasDerivedFrom Failure_rate?oldid=604152451.
• Failure_rate depiction Exponential_pdf.svg.
• Failure_rate isPrimaryTopicOf Failure_rate.