What is FIT/MTBF and how is it calculated?

A) The Failures In Time (FIT) rate of a device is the number of failures that can be expected in one billion (109 ) device hours of operation. (For example, 1000 devices for 1 million hours, or 1 million devices for 1000 hours each, or some other combination). MTBF means Mean Time Between Failures, and it is the average time elapsed between two failures in the same asset.

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