Reliability Modeling of Transport Systems: Influence of the Running-in Period of Life

Improving reliability in the context of transportation is of great importance. The running-in period allows material to increase its life duration and therefore its availability. This means the modelling of early failures, considering the specific distributions of failure time. Unlike the exponential distribution which is used for random failures, these distributions must have at least two parameters. Despite the fact that the log normal and normal distributions are frequently used to model the effects of aging, the Weibull distribution is probably the most universally used. With it, we can model the early and random failures as well as the effects of aging. The Weibull distribution (3 parameters) describes the situations in which some time t0 must pass before a failure happens. It is equal to a two-parameter distribution with a right to a translation. This work consists of modelling the influence of running-in time over the duration of additional life.