Failure Failure Access in telecommunications is the process by which an effort to communicate through an electronic communications system is carried out. ...more on Wikipedia about "Access in telecommunications"
Annualized failure rate, or short AFR is the reciprocal of the mean time between failure ( MTBF) expressed in years and percent. ...more on Wikipedia about "Annualized failure rate"
In fault-tolerant distributed computing, a Byzantine failure is an arbitrary fault that occurs during the execution of an algorithm by a distributed system. It encompasses those faults that are commonly referred to as "crash failures" and "send and omission failures." When a Byzantine failure has occurred, the system may respond in any unpredictable way. ...more on Wikipedia about "Byzantine failure"
A cascading failure is failure in a system of interconnected parts, where the service provided depends on the operation of a preceding part, and the failure of a preceding part can trigger the failure of successive parts. Redundant parts can lessen the impact of, but not prevent, a failure. Monitoring the operation of a system, in real-time, and judicious disconnection of parts can stop a cascade. ...more on Wikipedia about "Cascading failure"
Damage tolerance is the ability to withstand damage. The term is most often used in aerospace engineering to indicate the following characteristics of a component or material: ...more on Wikipedia about "Damage tolerance"
Explosive decompression (ED) refers to a sudden marked drop in the pressure of a system that occurs in less than 0.1 seconds, associated with explosive violence. Generally it results from some sort of material fatigue or engineering failure, causing a contained system to suddenly vent into the external atmosphere. ...more on Wikipedia about "Explosive decompression"
Failover is the capability to switch over automatically to a redundant or standby computer server, system, or network upon the failure or abnormal termination of the previously active server, system, or network. Failover happens without human intervention and generally without warning, unlike switchover. ...more on Wikipedia about "Failover"
Failure in general refers to the state or condition of not meeting a desirable or intended objective. It may be viewed as the opposite of success. ...more on Wikipedia about "Failure"
Failure analysis is the process of determining the cause of failure, collecting and analyzing data, and developing conclusions to eliminate the failure mechanism causing specific device or system failures. It is an important discipline in many branches of manufacturing industry, such as the electronics industry, where it is a vital tool used in the development of new products and for the improvement of existing products. ...more on Wikipedia about "Failure analysis"
A failure mode is a characterization of the way a product or process fails. ...more on Wikipedia about "Failure mode"
Failure mode and effects analysis (FMEA) is a fault tree method (first developed for systems engineering) that examines potential failures in products or processes. It may be used to evaluate risk management priorities for mitigating known threat-vulnerabilities. ...more on Wikipedia about "Failure mode and effects analysis"
A failure rate is the average frequency with which something fails. Failure rate, often denoted by the Greek letter (lambda), is important in reliability theory. The failure rate depends on the failure distribution, which describes the probability of failure prior to a specified time. Another way of expressing failure rate is the mean time between failure (MTBF), which is the " average" time between failures. The failure rate is not always constant, so the hazard function is used to describe the instantaneous failure rate at any point in time. The bathtub curve, a particular form of the hazard function, is a typical representation of the failure rate of a system during its operating life. ...more on Wikipedia about "Failure rate"
(Failure-of-imagination) Failure of imagination is a general phrase for not having predicted or forseen something which was possible to predict or forsee. ...more on Wikipedia about "Failure-of-imagination"
Fault tolerant design refers to a method for designing a system so it will continue to operate, possibly at a reduced level (also known as "graceful degradation"), rather than failing completely, when some part of the system fails. The term is most commonly used to describe computer-based systems designed to continue more or less fully operational with, perhaps, a reduction in throughput or response time in the event of some partial failure. That is, the system as a whole is not stopped due to problems either in the hardware or the software. An example in another field is a motor vehicle designed so it will continue to be drivable if one of the tires is punctured. ...more on Wikipedia about "Fault-tolerant design"
Fault-tolerance or graceful degradation is the property of a system that continues operating properly in the event of failure of some of its parts. If its operating quality decreases at all, the decrease is proportional to the severity of the failure, as compared to a naively-designed system in which even a small failure can cause total breakdown. Fault-tolerance is particularly sought-after in high- availability or life-critical systems. ...more on Wikipedia about "Fault-tolerant system"
Graceful failure of a program is a term used in computing to express unability of the program to perform requested oparation of which user is notified. This is the prefered method of dealing with failure as opposed to ...more on Wikipedia about "Graceful failure"
Lusser's Law is a prediction of reliability named after Robert Lusser. It states that the reliability of a series system is equal to the product of the reliability of its component subsystems, if their failure modes are known to be statistically independent. ...more on Wikipedia about "Lusser's Law"
Mean time to recovery (MTTR) is the average time that a device will take to recover from a non-terminal failure. Examples of such devices range from self-resetting fuses (where the MTTR would be very short, probably seconds), up to whole systems which have to be replaced. ...more on Wikipedia about "Mean time to recovery"
In telecommunication, the term power failure transfer has the following meanings: ...more on Wikipedia about "Power failure transfer"
A power outage is the loss of the electricity supply to an area. ...more on Wikipedia about "Power outage"
Reliability engineering is the discipline of ensuring that a system will be reliable when operated in a specified manner. Reliability engineering is performed throughout the entire life cycle of a system, including development, test, production and operation. ...more on Wikipedia about "Reliability engineering"
A product's service life is its expected lifetime. It is the time for which MTBF applies and is usually 2 to 5 years for most commercial and consumer products (for example computer peripherals and components). Most items to which this applies follow a bathtub curve of reliability and the service life is the width of the well at the bottom of the curve. ...more on Wikipedia about "Service life"
Structural failure refers to loss of the load-carying capacity of a component or member within the structure or of the structure itself. Structural failure is initiated when the material is stressed to its strength limit, thus causing fracture or excessive deformations. The ultimate failure strength of the material, component or system is its maximum load-bearing capacity. When this limit is reached, damage to the material has been done, and its load-bearing capacity is reduced significantly and quickly. In a well-designed system, a localized failure should not cause immediate or even progressive collapse of the entire structure. Ultimate failure strength is one of the limit states that must be accounted for in civil engineering. ...more on Wikipedia about "Structural failure"
According to peace and conflict theorist Thomas Homer-Dixon, synchronous failure is a symptom of an overly complex and interconnected global society and economy. Small groups of people also have the power to kill large numbers of people and sabotage systems they depend on, thanks to the leverage offered by technology, and its inherent fragility: ...more on Wikipedia about "Synchronous failure"
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