Template:WebNotes/Weibull++Standard Folio Data Mixed Weibull: Difference between revisions

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Revision as of 22:09, 18 April 2014

Mixed Weibull Distribution

Mixed Weibull analysis (also called multimodal Weibull analysis) can be used in situations when there are multiple failure behaviors, or trends, that exist in a single data set. The method may be useful when dealing with failure modes that cannot be assumed to be independent (i.e., the occurrence of one failure mode affects the probability of occurrence of the other mode) and/or when it is not possible to identify the failure mode responsible for each individual data point. To use mixed Weibull analysis, you will need to specify how many subpopulations exist in the data set (2, 3 or 4). The software will determine the proportion of units that fall under each subpopulation, and calculate the Weibull parameters of those subpopulations. The overall reliability of the full data set is then calculated by taking the sum of the proportional reliability contributions of each subpopulation.


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