MTBF is the average lifetime of an operating system. In thermal imaging it generally refers to the infrared detector. The military has a specific standard, MIL-HDBK-317, for determining this number. It is calculated as MTBF = 1,000,000 / Unit Failure Rate.
Mean time between failure. A measure of hardware reliability.
Mean Time Between Failure. See Lifetime.
This is an indicator of reliability, and may be calculated or demonstrated. At Condor, calculated values are based upon Bellcore TR-332. Demonstrated values are usually arrived at by operating a population of power supplies at elevated ambient temperature at full load.
In the case of repairable systems, MTBF stands for ean ime etween ailures. This average time excludes the time spent waiting for repair, being repaired, being re-qualified, and other downing events such as inspections and preventive maintenances and so on; it is intended to measure only the time a system is available and operating. Whereas, in the case of non-repairable systems, MTBF stands for ean ime efore ailure and is represented by the mean life value for a failure distribution of non-repairable units.
The estimated or actual average time period between failures in a computer component or system; also known as MTTF (mean time to failure).
This is a time normally given in hours that predicts the failure of a device. The larger the number the better.
ean ime etween ailure - Average life expectancy of electronic components.
MTBF measures the average time that a device works properly without failure; unfortunately, it's usually measured in hours. An hour measurement does not translate well to the average consumer looking for life expectancy in years.
Calculated failure rate of a power supply given in hours.
Mean Time Before Failure, a measure of device reliability
ean ime etween ailures, a term used to specify the rate of failure occurrence under a defined set of operating conditions. Most commonly the rate is calculated using MIL-STD-217.
the average service life of a piece of process equipment, particularly for rotating equipment. A refinery's MTBF is one indicator of the effectiveness of its maintenance program.
Abbreviation for ean ime etween ailure. MTBF Is a statistical term relating to reliability as expressed in power on hours (p.o.h.) and is often a specification associated with hard drive mechanisms. It was originally developed for the military and can be calculated several different ways, yielding substantially different results. It is common to see MTBF ratings between 300,000 and 1,000,000 hours for hard disk drive mechanisms, which might lead you to conclude that the specification promises between 30 and 100 years of continuous operation. This is not the case! The specification is based on a large (statistically significant) number of drives running continuously at a test site with data extrapolated according to various known statistical models to yield the results. Based on the observed error rate over a few weeks or months, the MTBF is estimated and not representative of how long your drive, or any individual product, is likely to last, nor is it a warranty. It is representative of the relative reliability of a family of products. A higher MTBF merely suggests a more reliable and robust family of mechanisms (depending upon the consistency of the statistical models used).
A type of standard used to calculate reliability, using the procedures set down by MIL-HDBK 217. read more...
Mean Time Before Failure. Expected time before first failure.
A measure of reliability. The reliability interval calculated in accordance with the procedures of MIL-HDBK 217.
Mean time between failure. This is a measure of reliability.
(Mean Time Between Failures) Estimated mechanical life span of a device, usually expressed in hours. Often used for disk drives.
Mean Time Between Failures. a measure of system or hardware reliability or availability.
Mean time between failure. Usually given in hours.
mean time between failures. n. 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. .
Mean Time Between Failures, a statistical estimate of the average operating time a device will run before it fails. MTBF is not a guarantee of fault-free run time, because a line of devices will have as many fail before the MTBF as it will after. The MTBF is the average time that a device will run before failing.
mean time between failures. The average period of operation before mechanical or software breakdown.
Mean Time Between Failures. A quality assurance index describing the expected reliability of our dataloggers.
Acronym for mean time between failures. Reliability rating indicating the expected failure rate of a product in power on hours (POH).
Average time (expressed in hours) that a component works without failure. It is calculated by dividing the total number of operating hours observed by the total number of failures. Also, the length of time a user may reasonably expect a device or system to work before an incapacitating fault occurs.
This refers to the mean time between failures. It is the reliability rating indicating the expected failure rate of a product in power on hours.
Mean Time Between Failures. The average time between expected device failures.
Mean Time Between Failure-Reliability rating indicating the failure rate expected of a product expressed in power on hours (POH). Since manufacturers differ in the ways they determine the MTBF, comparisons of products should always take into account the MTBF calculation method.
Mean Time Between Failure. A measure of reliability for electronic equipment, usually determined in benchmark testing. The higher the MTBF, the more reliable the hardware.
Mean time between failures. A common database statistic important to tuning I/O.
Mean Time Between Failure. Hours of use for all units of a specific type (time) divided by the number of confirmed failures for all units of that type (number of failures).
See Mean Time Between Failures
(Mean Time Between Failures) may be calculated or demonstrated. The usual calculation is per Mil-Std 217 rev E. Demonstrated reliability is usually determined by temperature accelerated life testing. Demonstrated MTBF is almost always greater than calculated MTBF.
Mean Time Between Failure, a measure of reliability. The longer the time span between failures, the more reliable the device.
meantime between failure.
The average length of time between system failures, exclusive of infant mortality and rated end-of-life.
Mean Time Between Failures. The arithmetic or statistical mean average time interval, usually in hours, that may be expected between failures of an operating unit. Results should be designated actual, predicted, or calculated.
Mean Time Between Failure (expressed in hours) is an average number of hours a specific hardware device will work before failing. Example: a CD-ROM model XYZ should function without failures 75,000 MTBF hours.
Mean Time Between Failure. The average time that a component is expected to work without failure. MTBF is the result of dividing the number of hours that a component is observed by the number of failures occurring during that period of time.
Mean Time Between Failures. The mean time expected between failures for repairable or replaceable items, typically measured in hours. MTBF is meant to be the mean over an infinite period of time MTBF is the inverse of the failure rate. If failure rate is in failures/million hours, MTBF = 1,000,000 / Failure.
Mean time between failure. The time interval in hours that may be expected between failures of operating equipment.
Mean Time Between Failure, measured in hours. May be calculated from the combined MTBF times of the discreet components of a new drive, power supply, etc.. May be calculated from the actual field data of an older drive, power supply, etc.. May be calculated from in-house "burn-in" testing. In any case, this number is an artificial construct that does not tract a drive/power supply's true reliability, and as such, should be used carefully.
(Mean Time Between Failure) - A measure of the reliability of an equipment, ie. the time to the first failure.
Mean Time Between Failures. Usually expressed in hours. (8/97)
The average amount of time that a component works before failure.
Mean Time Between Failure. The failure rate of a SMPS expressed in hours, usually calculated using the MIL-HDBK-217F, at 25°C and a Ground Benign environment.
A term describing the reliability of equipment established by testing kit to its limits and promoting the MTBF as a selling point. As most users know, however, laboratory and operational environments have little in common.
Mean time between failures. The average time interval between failures for repairable product for a defined unit of measure; for example, operating hours, cycles and miles.
An abbreviation of Mean Time Between Failure, a theoretical period of time between failures in equipment based on stresses in environment, temperature, levels of quality and other parameters.
Abbreviation for mean time between failures.
Mean Time Between Failure. A reliability term that expresses a component's average failure rate in hours.
Acronym that stands for Mean Time Between Failure. The probable length of time that a component taken from a particular batch will survive if operated under the same conditions as a sample from that particular batch. This measure of product reliability has been rendered largely meaningless. MTBF figures do not require certification of any kind and are frequently generated by marketing departments rather than engineering groups.
Mean time between failures was a term adopted by the military and elaborated on in MIL-HDBK-217, which provides values for capacitors, resistors, etc. An alternate standard was developed by Bell Labs (Bellcore).
Mathematical calculation of the duration of normal operation of a repairable device between failures. The product, expressed in hours, is an indication on the reliability of the device.
Mean time before failure. This is a statistical calculation, not a measurement. All the parts in a device have mean time between failure ratings. These are mathematically combined to get an MTBF number, often dependent on the stress put on them. Even the via holes in a circuit board have MTBF ratings. As you might think, as a rule of thumb, the more parts the less the MTBF. However, sometimes you can replace one part with a few more reliable parts, or spread the stress of one part over several parts and increase the MTBF. The human body has a trillion cells and each cell has an MTBF of 6 years. No wonder I don't feel so good. By the way, PowerStream engineers are well equipped to calculate MTBF using MIL-HDBK-217E.
Mean Time Between Failures. A measure of quality expressed in hours of life, stating the relative reliability of a component, circuit, or system. The average time before a failure will occur. The MTBF of a system or subsystem is a calculation taking into consideration the MTBF of each component in it. It is the statistical average operation time between the start of a unit?s lifetime and its time of failure.
An average time between machinery breakdowns. If the MTBF decreases, root cause analysis must be carried out to bring the MTBF to a high, meaning long times between failures
Mean Time Between Failures (Thanks to Stephen Butler)
Mean Time Between Failures. A measure of how reliable a hardware product or component is. For most components, the measure is typically in thousands or even tens of thousands of hours between failures. For example, a hard disk drive might have an MTBF of 300,000 hours. A desired MTBF can be used as a quantifiable objective when designing a new product. The MTBF figure can be developed as the result of intensive testing, based on actual product experience, or predicted by analyzing known factors. The manufacturer might provide it as an index of a product's or component's reliability, and in some cases, to give customers an idea of how much service to plan for.
( ean ime etween ailure) Measurement of the relative reliability of a power supply based upon actual operating data or calculated according to MIL-HDBK-217.
Mean Time Between Failures. The mean time expected between failures, typically measured in hours. MTBF is a statistical value and is meant to be the mean over a long period of time and large number of units. For constant failure rate systems, MTBF is the inverse of the failure rate. If failure rate is in failures/million hours, MTBF = 1,000,000 / Failure Rate for components with exponential distributions. Technically MTBF should be used only in reference to repairable items, while MTTF (Mean Time to Failure) should be used for non-repairable items, but MTBF is commonly used for both repairable and non-repairable items.
Mean Time Between Failure. The average time a manufacturer estimates before a failure occurs in a component, a printed circuit board or a complete system.
Mean Time Between Failures. A basic measure of reliability for repairable items. It can be described as the number of hours that pass before a component, assembly, or system fails. Also (MTBR) Mean Time Between Repairs.
Mean Time Between Failure - the average time between failures for a given piece of equipment or equipment set.
mean time between failures. Also MTTR, mean time to repair
MTBF is an acronym for Mean Time Between Failures, which indicates how likely a hard drive or printer is to fail within the first few hours of operation. Generally the MTBF will be a very large number like 300,000 hours, which means that of all hard drive of a particular class that were tested by the manufacturer before being shipped out, there was one failure per 300,000 hours of testing. However, each drive is usually only tested for about two hours. More useful numbers for consumers to look at are a drive or printer's service life and warranty.
mean time between failures. The limit of the ratio of operating time of equipment to the number of observed failures as the number of failures approaches infinity. The total operating time divided by the quantity (n + 1), where n is the number of failures during the time considered.
Mean Time Between Failures (average length of time a piece of equipment stays up and running)
Mean Time Between Failures – average time between restoration of service following an incident and another incident occurring
Mean Time Between Failures (21)
Mean Time Between Failures. A figure that gives an estimate of the reliability of a piece of equipment. The higher the MTBF, the longer the equipment should last. For example, if the MTBF is 10,000 hours, the equipment should run, on the average, for 10,000 hours before failing.
Mean Time Between Failure. The statistically relevant up-time between equipment failure. See also FIT.
mean time between failures. 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 can reasonably expect a device or system to work before an failure occurs.
Mean Time Between Failure. Average length of time for which a system, or a component of a system, works without fault.
mean time between failure, a measurement of reliability.
(Mean Time Between Failure) A measure of the average time interval between a previous failure and the onset of the next failure of a device or network. MTU
The failure rate of a power supply, expressed in hours, established by the actual operation or calculation from a known standard such as MIL-HDBK-217.
Mean Time Between Failures. A measure of how reliable a piece of hardware or a component is.
Mean Time Before Failure. An indicator of expected system reliability calculated on a statistical basis from the known failure rates of various components of the system. MTBF is usually expressed in hours. Over a long performance measurement period, the measurement period divided by the number of failures that have occurred during the measurement period.
Mean Time Between Failure - A calculated figure representing the estimated average lifetime of a device before it fails.
(mean time between failure) expected drive life before first failure
Mean Time Between Failure. Mean time between failure (MTBF) is a measure of the theoretical times a component or device will operate without failing. It is expressed in hours. It comes initially from Military Standards but ...
see Mean Time Between Failure
Mean Time Between Failure. Average time between failures. Used to compute the reliability of devices/equipment.
Mean time between failures. The average time interval between failures for repairable product for a defined unit of measure (e.g., operating hours, cycles, miles). See: reliability.
General computing. Mean Time Between Failures. : Calculated by dividing the total operating time in hours at all field sites by the number of equipment failures from all field sites. Failure of the equipment means failure that requires repair, adjustments, or replacement. Mishandling by the operator, failure due to adverse environmental conditions, power trouble, host system trouble, and other failures not caused by the equipment are not considered.
The average length of time for which the system, or a component of the system, works without fault.
Mean Time Between Failures, the average time from start of use to failure in a large population of identical systems, computers, or devices.
Abbreviation for mean time between failure. Time after which 50% of the units of interest will have failed. Also called MTTF (mean time to failure).
Mean Time Between Failure. Used by manufacturers to measure reliability of equipment. Almost always measured in hours. Keep in mind that an MTBF figure for a LAN card or a computer is always longer than what you will find in your own experience, because testing methods by manufacturers in laboratories do not reproduce office environments very well.
Mean time between failure. Used to measure computer component average reliability/life expectancy. MTBF is not as well-suited for measuring the reliability of array storage systems as MTDL, MTTR or MTDA (see below) because it does not account for an array's ability to recover from a drive failure. In addition, enhanced enclosure environments used with arrays to increase uptime can further limit the applicability of MTBF ratings for array solutions.
n. Acronym for mean time between failures. The average time interval, usually expressed in thousands or tens of thousands of hours (sometimes called power-on hours or POH), that will elapse before a hardware component fails and requires service.
"Mean Time Between Failures", a measure of average service life.
Mean Time Between Failures. An average length of time (hours) during which hardware is expected to function without problems.
Mean Time Between Failures. The average time between two failures and therefore is a measure of the trouble free time
The length of time that a user can expect a piece of equipment to remain operable before it experiences a serious fault.
Mean Time Between Failure. The measurement of the reliability of equipment expressed in the average operational hours before a service interrupting failure. Based upon either actual operating data or calculated data per MIL-HDBK 217.