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What is the difference between MTBF and MTTF?

                                     What is the difference between MTBF and MTTF ?

MTBF or MTTF is index about power supply life. The failed system can be repaired and recovered immediately (zero elapsed time) as "mean time to failure "(MTTF), which measures average time between failures of non-repairable systems only. However, in practice, MTBF is commonly used for both types of systems,include repairable and non-repairable.