JMP does not have a facility for fitting nonlinear mixed models, but this script can be helpful in invoking the SAS PROC NLMIXED to do the work, using the model formulas in from JMP. With degradation analysis you need to import back the estimates and plug them into a model , and invert the model to produce crossing times. The documents include a journal, the script, and sample data sufficient to do the Device B degradation example from Meeker and Escobar.
