The Pacific Northwest (PNW), sometimes referred to as Cascadia, is a geographic region in western North America bounded by the Pacific Ocean to the west and (loosely) by the Cascade Mountain Range on the east.
Mean time between failures (MTBF) describes the expected time between two failures for a repairable system, while mean time to failure (MTTF) denotes the expected time to failure for a non-repairable system. the MTBF is the sum of the operational periods divided by the number of observed failures.
MTTF, MTBF, Mean Time Between Replacements and MTBF with Scheduled Replacements. Seasoned reliability engineers know that there is a great deal of discussion and confusion regarding the terms MTTF and MTBF. We certainly hope that the addition of two more terms in the title won't scare readers away!