These computers were designed with extremely long mean times to failure.
2.
We had a hard disk with a mean time to failure of 13 years.
3.
MTBF consists of mean time to failure ( MTTF ) and mean time to repair ( MTTR ).
4.
:IBM hardware has a concept mean time to failure which is when they expect it to fail, on average.
5.
For instance, a test that is measuring lifespan may look only at the mean time to failure of the test objects, or it may try to gamma distributions.
6.
A 50 % reduction of mean time to failure does not adequately explain why the inner lower boom in VH-RMQ should have failed before reaching its retirement life.
7.
However availability optimization approaches provide solutions only at selected points in time ( not all times ), using mean time to failure ( or fixed rate demand ) and mean time to repair as deterministic values as part of convex optimization.
8.
The figure shows a histogram of the time between failures and a fitted exponential density curve with " & lambda; " = 1 / ( mean time to failure ) = 1 / 59.6 = 0.0168.
9.
The disadvantage to a thin or removed ion barrier is the overall decrease in tube life from a theoretical 20, 000 hrs mean time to failure ( MTTF ) for Gen III type, to 15, 000 hrs MTTF for GEN IV type.
10.
:: This is the sort of thing that probably affects the mean time to failure; so if you ran hundreds of test cases with laptops in a bus and compared the failure rate to laptops not used in a bumpy bus, you'd probably notice a trend.
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