According to General Livingston's humorous account, his own village of Elizabethtown was not much more reliable, being peopled in those agitated times by unknown, unrecommended strangers, guilty-looking Tories, and very knavish Whigs. --Washington Irving.
The term 'reliable' refers to a service or protocol that provides for recovering from errored transmission states Examples of techniques used to assure reliability are Acknowledgements and error-checking See also: unreliable
Information that is reliable or that is from a reliable source is very likely to be correct. There is no reliable information about civilian casualties + reliably re·li·ably Sonia, we are reliably informed, loves her family very much. + reliability re·li·abil·ity Both questioned the reliability of recent opinion polls. someone or something that is reliable can be trusted or depended on = dependable rely
Of a communication protocol, in which a sent packet will reach its destination, even if it requires retransmission, or the sender will be told that it didnt
worthy of reliance or trust; "a reliable source of information"; "a dependable worker
worthy of being depended on; "a dependable worker"; "an honest working stiff"; "a reliable source of information"; "he was true to his word"; "I would be true for there are those who trust me"
worthy of reliance or trust; "a reliable source of information"; "a dependable worker"
Statistical reliability refers to measurements that can be repeated with time For example, a variable or statistic is said to be reliable if its value can be measured in the same way in repeated experiments
People or things that are reliable can be trusted to work well or to behave in the way that you want them to. She was efficient and reliable Japanese cars are so reliable. + reliably re·li·ably It's been working reliably for years. + reliability re·li·abil·ity He's not at all worried about his car's reliability
The information is based on the best available evidence It should state: its aims and relevance; its sources; and the date of production It should be presented in a well-balanced manner, signposting other resources, and should disclose areas of uncertainty
conforming to fact and therefore worthy of belief; "an authentic account by an eyewitness"; "reliable information"
The ability of an item to perform a required function under stated conditions for a stated period of time NOTE: The term reliability is also used as a reliability characteristic denoting a probability of success, or a success ratio (a) Mission Reliability The ability of an item to perform its required mission critical functions for the duration of a specified mission or life profile (b) Basic Reliability The ability of an item to perform its required functions without failure for the duration of a specified mission profile ADDITIONAL NOTE: Usually, unless stated to the contrary, Reliability is deemed to include Durability
Trust in the accuracy or provision of one's results; in the case of tests, it is an expression of the precision, consistency and reproducibility of measurements Ideally, measurements should be the same when repeated by the same person or made by different assessors In tests, contributing factors to reliability are the consistency of marking, the quality of test and test items, and the type and size of the sample Satisfactory reliability of objective tests can be achieved by having large numbers of well-constructed test items marked by computer Reliability is characterized by the stability, equivalence, and homogeneity of test
The extent to which different operationalisations of the same concept produce consistent results To provide results that are statistically reliable a reasonably large and representative sample is required
The degree to which the results of an assessment are dependable and consistently measure particular student knowledge and skills Reliability is an indication of the consistency of scores over time, between scores, or across different tasks or items that measure the same thing If scores from an assessment are unreliable interpretations based on these scores, and subsequent decisions, will not be valid
The capability of a computer, or information or telecommunications system, to perform consistently and precisely according to its specifications and design requirements, and to do so with high confidence
The assurance that a component will perform in a specified manner for a specified time under a set of specified conditions that include electrical, mechanical, thermal, and environmental stresses The concept of reliability encompasses the elements of both quality and longevity See STABILITY
An indication of how consistent test scores will be, given different testing conditions or editions of a test A test or measure is reliable when it is consistent (i e , repeated measurements would show the same achievement or several observers of a classroom situation would closely agree with ratings recorded for individuals on the same criterion)
Reliability refers to two technical criteria: consistency and "generalizability " The first criterion seeks consistency in results For example, will a student's score on a test today be close to his/her score tomorrow? "Generalizability" seeks to ensure that an assessment's questions that cover a subset of skills can capture or "generalize" a broader universe of skills
Extent to which a measurement (such as an instrument or a data collection procedure) produces consistent results over repeated observations or administrations of the instrument under the same conditions each time It is also important that reliability be maintained across data collectors (a concept called interrater reliability)
The consistency with which a test measures the area being tested; describes the extent to which a test is dependable, stable, and consistent when administered to the same individuals on different occasions
The extent to which an observation that is repeated in the same, stable population yields the same result (i e , test-retest reliability) Also, the ability of a single observation to distinguish consistently among individuals in a population
an indication of the consistency of scores across evaluators over time or across different versions of a test For example, a test is reliable when different teachers or other evaluators give student responses the same or similar scores no matter when the assessment takes place or who does the scoring
The degree to which assessment evidence supports a clear, complete, and accurate understanding of the quality of an individual students performance across time, tasks, and scorers (i e , credibility and representativeness of the evidence)
The same as calibration, it is the degree of correspondence, over one or more subsamples of verification data involving identical forecasts, between the average observations for the subsamples and the respective forecasts For J subsamples of K probability forecasts, the reliability is defined as
the degree of performance of the elements of the bulk electric system that results in electricity being delivered to customers within accepted standards and in the amount desired May be measured by the frequency, duration, and magnitude of adverse effects on the electric supply
Electric system reliability has two components -- adequacy and security Adequacy is the ability of the electric system to supply the aggregate electrical demand and energy requirements of the customers at all times, taking into account scheduled and unscheduled outages of system facilities Security is the ability of the electric system to withstand sudden disturbances such as electric short circuits or unanticipated loss of system facilities
The probability that an item can perform a required function under given conditions for a given time interval Note: It is assumed that the item is in a state to perform this required function at the beginning of the time interval
The ability of the electric system to supply the electrical demand and energy requirements at all times and to withstand sudden disturbances such as electric short circuits or unanticipated loss of system facilities
An indicator of score consistency over time or across multiple evaluators Reliable assessment is one in which the same answers receive the same score regardless of who performs the scoring or how or where the scoring takes place The same person is likely to get approximately the same score across multiple test administrations
The ability of an item to perform a required function under stated conditions for a stated period of time The numerical value of reliability is expressed as a probability from 0 to 1 and is also sometimes known as the probability of mission success Reliability is the probability, assuming the system was operating at time zero, that it continues to operate until time t
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