Weibull distribution

life distribution with shape and scale

R(t) = exp(−(t/η)^β)

The most used distribution in reliability engineering. The shape β shows the failure mode (early, random or wear-out) and the scale η is the time by which 63.2 % of units have failed. B10 life is the time by which 10 % fail.

Calculate it

Weibull Analysis: Weibull β and η, B10 life, MTTF and reliability curve from failure data.

Related terms

• DPMO: defects per million opportunities