A baseline saves nearly 20 pieces of information, including totals and time phased information for tasks, resources, and assignments. You can save 1 baseline. Baseline will essentially store 5 things: cost, work, duration, start date and finish date. The baseline is a copy of the Start, Finish, Work, and Cost for all the Resources, plus Duration for all the Tasks in your project. When you do a baseline you save the following data about the project at that specific point in time.