The Time Boxed, Fixed Team solution method estimates how much functionality (size) can be delivered, given a specified schedule, effort/staff, and productivity. This method is often used for Agile development.
To create a new Time Boxed, Fixed Team solution, click the Create New Project from Template icon from the project list page, then select Estimation from the list of project types. Select a configuration source, then OK to go to the Assumptions tab of the Edit Estimate dialog and select Time Boxed, Fixed Team from the list of solution methods. If you are working with an existing project, you can just select Time Boxed, Fixed Team from the solution methods listed on the Assumptions tab.
The input fields on the right-hand size of the Assumptions tab will update to display only the inputs needed for this solution method.