cost breakdown structure
Used as an alternative to the WBS, the CBS is a useful way to use outline codes to group the project's tasks by cost centre. Sophisticated totals and subtotals can be created to determine how effectively the project is progressing, cost area by cost area.
A hierarchical structure that rolls budgeted resources into elements of costs, typically labor, materials and other direct costs.
SOURCE: welcom.comSOURCE: apm.com