JMP can open Excel spreadsheets directly. Just go to
File==>Open
If your spreadsheet is not just in a simple row and column structure, you can specify to use the Excel Wizard to input the spreadsheet. Just Navigate to the spreadsheet file, select the file of interest, and then using the dropdown arrow on the "Open" button, select "Use Excel Wizard"
Once the table is open, you can rn your stability analysis.
Jim