MEAN TIME BETWEEN FAILURES

In engineering and telecommunication, the term mean time between failures (MTBF) has the following meanings:

An indicator of expected system reliability calculated on a statistical basis from the known failure rates of various components of the system.
Note: MTBF is usually expressed in hours.
Of a system, over a long performance measurement period, the measurement period divided by the number of failures that have occurred during the measurement period.
For population of items, during a measurement period, the total functioning life of the population of items divided by the total number of failures within the population during the measurement period.

Note 1: The total functioning life of the population may be calculated as the summation of the operating life of every item in the population over the measurement period. When computing the MTBF, any measure of operating life may be used, such as time, cycles, kilometers, or events.

Note 2: For example, if a total of 1,000 events, such as data transfers, radio transmissions, or system boots, occurs in a population of items during a measurement period of 100 hours and there are a total of 10 failures among the entire population, the MTBF for each item is (1000)(100)/10 = 10⁴ hours.

Source: from Federal Standard 1037C

Language		Translations for "MEAN TIME BETWEEN FAILURES"; alternative meanings/domain in parentheses.
Danish		MTBF (mean time between failure, mean time between failure observed, MTBF, predicted mean time between failures), middeltiden mellem fejl (mean time between failure, mean time between failure observed, MTBF, predicted mean time between failures), konstateret gennemsnitstid med god funktion (mean time between failure, mean time between failure observed, MTBF, predicted mean time between failures), gennemsnitstid mellem fejl (mean time between failure, mean time between failure observed, MTBF, predicted mean time between failures), gennemsnitstid med god funktion (mean time between failure, mean time between failure observed, MTBF, predicted mean time between failures), forudsagt middeltid mellem fejl (mean time between failure, mean time between failure observed, MTBF, predicted mean time between failures). (various references)

Dutch		MTBF (mean time between failure, mean time between failure observed, MTBF, predicted mean time between failures), gemiddelde tijd tussen storingen (mean time between failure, mean time between failure observed, MTBF, predicted mean time between failures), gemiddeld tijdsverloop tussen storingen (mean time between failure, mean time between failure observed, MTBF, predicted mean time between failures), gemiddeld storingsvrij interval (mean time between failure, mean time between failure observed, MTBF, predicted mean time between failures). (various references)

Finnish		MTBF (mean time between failure, mean time between failure observed, MTBF, predicted mean time between failures), keskimääräinen vikaväli (mean time between failure, mean time between failure observed, MTBF, predicted mean time between failures). (various references)

French		MTBF (mean time between failure, mean time between failure observed, meantime before failure, meantime between failures, mean-time-between-failures, predicted mean time between failures), moyenne des temps de bon fonctionnement observés (mean time between failure, mean time between failure observed, predicted mean time between failures), moyenne des temps de bon fonctionnement (mean time between failure, mean time between failure observed, mean-time-between-failures, predicted mean time between failures), temps moyen entre pannes (mean time between failure, mean time between failure observed, mean-time-between-failures, predicted mean time between failures), prédité (mean time between failure, mean time between failure observed, predicted mean time between failures). (various references)

German		MTBF (mean time between failure, mean time between failure observed, MTBF, predicted mean time between failures), mittlerer Ausfallabstand (mean time between failure, mean time between failure observed, MTBF, predicted mean time between failures), mittlere Zeitspanne zwischen zwei Stoerungen (mean time between failure, mean time between failure observed, MTBF, predicted mean time between failures), mittlere störungsfreie Zeit (mean time between failure, mean time between failure observed, MTBF, predicted mean time between failures), vorausberechneter mittlerer Ausfallabstand (mean time between failure, mean time between failure observed, MTBF, predicted mean time between failures). (various references)

Greek		μέση τιμή των χρόνων καλής λειτουργίας (mean time between failure, mean time between failure observed, MTBF, predicted mean time between failures), μέσος χρόνος καλής λειτουργίας (mean time between failure, mean time between failure observed, MTBF, predicted mean time between failures), μέσος χρόνος μεταξύ παρατηρηθεισών διακοπών (mean time between failure, mean time between failure observed, MTBF, predicted mean time between failures), μέσος χρόνος μεταξύ διακοπών (mean time between failure, mean time between failure observed, MTBF, predicted mean time between failures), προβλεπόμενος μέσος χρόνος μεταξύ διαδοχικών βλαβών (mean time between failure, mean time between failure observed, MTBF, predicted mean time between failures). (various references)

Hungarian		meghibásodások közötti átlagidõ (mtbf). (various references)

Italian		MBTF (mean time between failure, mean time between failure observed, MTBF, predicted mean time between failures), tempo medio tra due guasti (mean time between failure, mean time between failure observed, MTBF, predicted mean time between failures), tempo medio tra due avarie (mean time between failure, mean time between failure observed, MTBF, predicted mean time between failures), tempo medio previsto tra guasto (mean time between failure, mean time between failure observed, MTBF, predicted mean time between failures), tempo medio fra i guasti (mean time between failure, mean time between failure observed, MTBF, predicted mean time between failures). (various references)

Pig Latin		eanmay imetay etweenbay ailuresfay

Portuguese		tempo medio entre avarias (mean time between failure, mean time between failure observed, MTBF, predicted mean time between failures), tempo médio previsto entre falhas (mean time between failure, mean time between failure observed, MTBF, predicted mean time between failures), tempo médio entre avarias (mean time between failure, mean time between failure observed, MTBF, predicted mean time between failures). (various references)

Spanish		MTBF (mean time between failure, mean time between failure observed, MTBF, predicted mean time between failures), tiempo medio previsto entre fallos (mean time between failure, mean time between failure observed, MTBF, predicted mean time between failures), tiempo medio entre fallos (mean time between failure, mean time between failure observed, MTBF, predicted mean time between failures), tiempo medio entre averías (mean time between failure, mean time between failure observed, MTBF, predicted mean time between failures). (various references)

Swedish		medeltid mellan fel (mean time between failure, mean time between failure observed, MTBF, predicted mean time between failures), predikterad medeltid mellan fel (mean time between failure, mean time between failure observed, MTBF, predicted mean time between failures). (various references)
Source: compiled by the editor from various translation references.

Domain	Definition
Computing	Mean Time Between Failures (MTBF, or "Mean Time Between Faults") The average time (usually expressed in hours) that a component works without failure. It is calculated by dividing the total number of failures into the total number of operating hours observed. The term can also mean the length of time a user may reasonably expect a device or system to work before an incapacitating fault occurs. See also Mean Time To Recovery. (1998-05-01). Source: The Free On-line Dictionary of Computing.
Electrical Engineering	For a stated period in the life of a functional unit, the mean value of the lengths of time between consecutive failures under stated conditions. Source: European Union. (references)
Source: compiled by the editor from various references; see credits.

MEAN TIME BETWEEN FAILURES

Specialty Definition: MEAN TIME BETWEEN FAILURES

Computing

Electrical Engineering

Specialty Definition: Mean time between failures

Crosswords: MEAN TIME BETWEEN FAILURES

Expressions: MEAN TIME BETWEEN FAILURES

Modern Translation: MEAN TIME BETWEEN FAILURES

Danish

Dutch

Finnish

French

German

Greek

Hungarian

Italian

Pig Latin

Portuguese

Spanish

Swedish

INDEX

Expressions using "MEAN TIME BETWEEN FAILURES": assessed mean time between failures ♦ extrapolated mean time between failures ♦ observed mean time between failures ♦ predicted mean time between failures. Additional references.
Source: compiled by the editor from various references; see credits.