This example uses the Devalt.jmp sample data table, from Meeker and Escobar (1998), and can be found in the Reliability folder of the sample data. It contains time-to-failure data for a device at accelerated operating temperatures. No time-to-failure observation is recorded for the normal operating temperature of 10 degrees Celsius; all other observations are shown as time-to-failure or censored values at accelerated temperature levels of 40, 60, and 80 degrees Celsius.
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Leave the Censor Code as 1.
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Select Weibull as the distribution.
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Keep Wald as the confidence interval method.
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Fit Life by X Launch Window shows the completed launch window.
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Click OK.
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Fit Life by X Report Window for Devalt.jmp Data shows the top half of the Fit Life by X report window.
Note: A message might appear stating that “Analysis must exclude groups that are all right censored to continue Nested Model Tests. Do you want to continue?” Click Yes to continue the analysis. Right censored groups indicate groups where all observations are right censored. In this example, group Temp = 10 has only one row, is considered to be right censored, and has to be excluded to allow the Nested Model Test. The message does not appear if your sample data does not include right censored observations.
Fit Life by X Report Window for Devalt.jmp Data
