Yes, I have an idea. please read Help > JMP Documentation Library > Reliability and Survival Methods > Chapter 3: Life Distribution. You will find lots of ideas there.
Enter your data like this:
![Capture 1.JPG Capture 1.JPG](https://community.jmp.com/t5/image/serverpage/image-id/22652iF763537DE75A9847/image-size/large?v=v2&px=999)
I do not think that the interval censoring is appropriate in this case. You simply observed the status every 30 days. I assume that each 30 day period is another sample. That is, you have a total sample size of 108. Enter columns in the analysis roles for launching Life Distribution
![Capture 2.JPG Capture 2.JPG](https://community.jmp.com/t5/image/serverpage/image-id/22653i963F275E5C92B4A0/image-size/large?v=v2&px=999)
Click OK and then you can either use the non-parametric estimates or fit a chosen model.
![Capture 3.JPG Capture 3.JPG](https://community.jmp.com/t5/image/serverpage/image-id/22654i6C430DA26BFF67AA/image-size/large?v=v2&px=999)
You enter Start and End, in that order, in the Y role together in a case with interval censoring.