Mean Time Between Failure
Way to quantify the performance of a machine or part.
MTBF = (Total Time of all Parts run) / (Total number of failures)
Good if all parts fail.
Bad if very few of the parts fail. It is very deceptive in this case.
A hypothetical machine generally runs between 60 and 100 hours before failing.
If you run 3 of them for a total of 240 hours, and all 3 fail, you have a MTBF of 80 hours per failure. Makes sense.
If you run 100 of them in an application where the job is complete after 50 hours, at which point you don't run it again, it is possible that only 10 or so will fail. MTBF could be about (90*50 + 10*25) / (10) = 475 hours per failure. This is insane, since you would be lucky if a singletool made it to 200 hours or continuous operation.
mean time between failures. it is used to measure the reliability of machines or systems. It is the result of dividing the total work time planned by the number of stoppages due to equipment failure.
In the american automobile plants mtbf has been found to be just 30% of that at the japanese makers, even in the US, like honda and toyota
1. In machines, the amount of time, when operating a bank of machines, between any one of them failing. Not lifetime, as hard drive manufacturers want you to think. It is the average amount of time between failures of indivdual parts when talking about a system.
2. In biology, the average lifespan of each individual organism which has a particular set of genes or "environment of luck". An "environment of luck" can be something like all people who fly on a plane, living around individuals who want you dead in the worst way,all people who smoke, or some other demographic.
1. When punching laced cards on a bank of keypunch punched-card makers, the average MTBF is about three cards.
1. In an average house, it is normal to burn out 3 incandescent light bulbs in a month. Therfore the MTBF is 10 days.
2. Teacher:"King tut only lived to be 19."
Mocking Student:"Wow, his MTBF is in the toilet!"
2. "The MTBF of John Benet Ramsey is quite short."
A sunburn or suntan focused on the left arm. It is caused by the left side of the body being the only half that gets exposed to sunlight while driving. Presumably, it would be located on the right side of the body in countries where they drive on the left side of the road.
British slang for a scientist or technical expert, esp . when the speaker is not certain of the expert’s specific field of study. Not necessarily derogatory, but typically used by persons without a technical background. In the US, the equivalent would be “egghead”, “squint”, or “geek.”
Origin of the word is unknown. Started sometime in World War 2. Given the typical evolution of British slang, could easily have started because what these experts did was confusing or “baffling” to the common person.
When you have to pee in a movie but don’t want to miss anything, and must do the following mental equation: will the amount I have to pee cause enough discomfort to diminish my attention capacity for the remainder of the movie to an extent which is greater than the amount of the movie I would miss by making a mad dash to the restroom.
I saw Satantango last night, wonderful film but by the 5th hour I had to start doing peecalculus.