Integrating scope, time, and cost data: The WBS is a key tool for summarizing the scope of a project, and the Gantt chart summarizes the time or schedule for a project. Project management software allows you to assign cost and other resources to tasks on the WBS, which are tied to the schedule.

This allows you to create a cost baseline and use earned value management to track project performance in terms of scope, time, and cost in an integrated fashion.