We illustrate how to use JMP with the revolutions-to-failure data of Lieblein and Zelen found in
"Statistical investigation of the fatigue life of deep grove ball bearings. "Lieblein, K. and Zelen, M. (1956) J. Res. Nt. bur. Stand., 57, 273-361.
Import into JMP the Ball Bearing data:
(Instructions for importing a text file into JMP)
The JMP table should look as follows:
The Censor code 0 means that the number given in the Revolution column is a failure time not a removal time. (A removal time would have a Censor value of 1.)
Proceed as follows:
To get the Exponential Plot we selected Exponential Plot from the check menu. This plot is given below:
To superimpose the best fitting exponential distribution proceed as follows:
To get the Weibull Plot proceed as follows:
To superimpose the best fitting Weibull distribution proceed as follows:
To get the Lognormal Plot proceed as follows:
To superimpose the best fitting lognormal distribution proceed as follows:
