The Reliability Analytics Toolkit L10 to MTBF Conversion tool provides a quick and easy way to convert a quoted L_{10%} life to an average failure rate (or MTBF), provided that an educated guess can be made regarding a Weibull shape parameter (β). Continue reading

# Tag Archives: Weibull Distribution

# Weibull Prediction of Future Failures

This is an example of a recently published in the Reliability Analytics Toolkit called Weibull Prediction of Future Failures. This tool is based on work described in references 1 and 2. For a population of N items placed on test, this tool calculates the expected number of failures for some future time interval based on the following two inputs:

1. the estimated Weibull shape parameter and

2. some number of failures (X>=1) during the initial time interval (t_{1}).

# Weibull Distribution

- The Weibull distribution is particularly useful in reliability work since it is a general distribution which, by adjustment of the distribution parameters, can be made to model a wide range of life distribution characteristics of different classes of engineered items. One of the versions of the failure density function is