The value you are seeking is known as Free Slack, which is defined as "...the amount of time a task can be delayed without delaying any successor tasks." To view the Free Slack amount, apply the Gantt Chart view, and then click the View tab to display the View ribbon. In the Data section of the View ribbon, click the Tables pick list button and select the Schedule table. Drag the split bar to the right so that you can see the Free Slack column. I duplicated your example project and determined that the Free Slack amount for Task 2 is 14 days. Hope this helps.