Weibull and log-normal distributions in reliability analysis applications

Œe life times of the components of an electrical device are o‰en analyzed in quality-control process. Likewise the Design of Experiment is used mainly to achieve quality but its' application to life times are less common. Life times always associate with Reliability. In this study we focus on application of reliability analysis. Œe main purpose is to optimize the response by extending the lifetimes of a fan motor. An important point is to determine the stress factors subjected to di‚erent conditions which signi€- cantly e‚ects the life times. Simulation design of weibull and log-normal distributions used to generate failure times and maximum likelihood (ML) applied in the estimation of parameters. A two level factorial experimental design is used to identify the factors that most inƒuence the lifetimes.