Consumption is the process of incorporating raw materials provided by the Federal Government into an end item or otherwise consuming them in the performance of the contract. Consumption of materials must be authorized by the agency. Quantities consumed must be reasonable and in proper quantities for the work being performed. The PI/Departmental Administrator must ensure that a) consumption of materials is accurately documented (including authorization from the granting agency); b) age-sensitive materials are consumed first; c) any unused material is returned to the Government; and d) excess government property has been screened for parts or components that are removed or recovered from repair, rework, testing or cannibalization.