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The Failure Rate Function

The 2-parameter Weibull failure rate function, λ(T), is given by:

[math]\displaystyle{ \lambda \left( T \right)=\frac{f\left( T \right)}{R\left( T \right)}=\frac{\beta }{\eta }{{\left( \frac{T}{\eta } \right)}^{\beta -1}} }[/math]