The Weibull distribution is often used to represent the distribution of failure times in reliability models (e.g., the distribution of lifetimes for light bulbs). It is defined by a Minimum, a Slope, and Mean-Minimum. If desired, it can be Truncated at its upper end by defining a Maximum:
Note:
The Slope of the Weibull is always dimensionless. If it is specified as 1, the
distribution collapses to an exponential distribution.