A Weibull Distribution uses the following parameters:
- Beta: Beta, also called the shape factor, controls the type of failure of the element (infant mortality, wear-out, or random).
- Eta: Eta is the scale factor, representing the time when 63.2 % of the total population is failed.
- Gamma: Gamma is the location parameter that allows offsetting the Weibull distribution on time. The Gamma parameter should be used if the datapoints on the Weibull plot do not fall on a straight line.
If the value of Beta is greater than one (1), you can perform Preventative Maintenance (PM) Optimizations. A Gamma different from a value zero (0) means that the distribution is shifted to fit the datapoints more closely.