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.
A: This is easy. Here's how : Just ride your bike, and keep track of the total miles, average riding speed, and a good guess at the total feet of climbing for that ride. Using this calculator, enter the distance, climbing and speed. If you also enter your total time, then this calculator can also calculate the riding factor.