The WBS is a hierarchical, product oriented division of hardware, software, services, and other work tasks which organizes, defines, and graphically displays the product to be produced as well as the work to be accomplished to achieve the specified product. An inverted tree structure that is composed of all of the discrete elements of a specific project. Each level represents the work in increasing detail. At a minimum the WBS is: (A) The assignment of responsibility. (B) The development and assignment of cost estimates. (C)The allocation of resources. (D) The identification of dependencies. (E) Financial and other contract reporting. (F) Risk assessment and monitoring.