Add the new column next to your milestone description column and list out a repetitive sequence of numbers such as 1, 2, 3, 4 or 5, 10, 15, 20 ect.
To create a timeline in Excel, you will also need to add another column to your table that includes some plotting numbers. In Excel 2007, 2010, 20 create a table out of these Milestones and next to each milestone add the due date of that particular milestone. These will be called Milestones and they will be used to create a timeline. List out the key events, important decision points or critical deliverables of your project. Download Excel Timeline template Instructions for creating an Excel timeline 1. List your key events or dates in an Excel table