Template:Weibull reliability function

The Weibull Reliability Function
The equation for the 3-parameter Weibull cumulative density function, cdf, is given by:


 * $$ F(t)=1-e^{-\left( \frac{t-\gamma }{\eta }\right) ^{\beta }} $$.

This is also referred to as unreliability and designated as $$ Q(t) \,\!$$ by some authors.

Recalling that the reliability function of a distribution is simply one minus the cdf, the reliability function for the 3-parameter Weibull distribution is then given by:
 * $$ R(t)=e^{-\left( { \frac{t-\gamma }{\eta }}\right) ^{\beta }} $$