Weibull++ Standard Folio Data Gumbel: Difference between revisions

Revision as of 16:58, 20 December 2011

Reliability Web Notes
Weibull Folio
Life Data Analysis
The Gumbell...
[math]\displaystyle{ f(T)={ \frac{\beta }{\eta }}\left( {\frac{T}{\eta }}\right) ^{\beta -1}e^{-\left( { \frac{T}{\eta }}\right) ^{\beta }} \,\! }[/math] Beta is the shape parameter or slope. Values less than one incicate a decreasing failure rate, greater then one an increasing failure rate, and when one a constant failure rate. Eta is the scale parameter, or characteristic life. Eta represents the time by which 63.2% of the units fail. [math]\displaystyle{ \beta= }[/math] shape parameter (or slope).
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-The Weibull distribution is one of the most widely used lifetime distributions in reliability engineering. It can model an increasing, decreasing and or constant failure rate behavior.  The 2-parameter Weibull is the most commonly used form of the distribution. It's pdf is given by:
+The Gumbell...
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