Time to Repair
Time to Repair (TTR) is a distribution representing the amount of time that passes before an element is placed back into operation. Based on different factors, a given type of repair will not always take the exact same amount of time. Worker and part availability, time of day, and other factors can all contribute to how long a particular repair will actually take. The TTR is a random distribution that is characterized off of past events to give the best estimate of repair time probabilities.
As such, the time a component actually takes to be repaired cannot be fully predicted, and the TTR is merely an approximation of the actual repair time.
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