"The WBS is fully dynamic — Budget, Hours, and % Progress at every parent node are automatically rolled up from the lowest-level leaf nodes. No values are manually entered at parent levels; everything propagates upward through the hierarchy, so the top-level project card always reflects the true consolidated state of all work packages below it."

A Work Breakdown Structure (WBS) is a hierarchical project management tool that breaks a project down into smaller, more manageable components.

An interesting way to represent the Work Breakdown Structure in Engineering Projects