squadron, or other unit to perform the task and function assigned. OPERATIONAL SUPPORT INVENTORY (OSI)— The range and depth of material required to support a planned aircraft program at a given site. It consists of a fixed allowance for field level repairable, depot level repairable, and an operating level of stock for consumables. ORDER AND SHIPPING TIME (O&ST)— The time between the submittal of requisition to the time of receipt of material. The O&ST is applicable to material only within the supply system. OTHER SUPPLY OFFICER (OSO) TRANSFER— A transfer of Defense Business Operations Fund material between two accountable officers. PRINCIPAL ITEM-A final combination of end products, components, parts, or material that is ready for its intended use. For example, ship, aircraft, or truck. PROCUREMENT QUALITY ASSURANCE— The act of a qualified technician in inspecting and certifying material acceptability for shipments received directly from a contractor. The inspection requires the technician to verify the original purchase contract specifications against the specifications of the material received and documented on the DD Form 250, Material Inspection and Receiving Report. PROVISIONING— The process of technical planning necessary to establish the individual item support;establishing minimum levels responsible for repair; identifying support equipment requirements, handbooks, manuals, and maintenance publications; determining the basic factory and field training requirements; and providing for the establishment of inventory management records. This process takes place when new equipment is purchased. QUALITY DEFICIENCY REPORT (QDR)— A report used to report quality deficient material to activities responsible for the design, development, purchasing, supply, maintenance, and contract administration so that the cause of the deficiency can be determined, deficiencies can be corrected, and action to prevent recurrence can be initiated. RANDOM SAMPLING INVENTORY— A method of determining the current inventory accuracy level whether or not there is a need for a total item count. It is considered to be part of the annual scheduled inventory program and a measure of the stock record accuracy for a segment of material based on the physical count of a specified number of randomly selected items within the segment. RANGE— The number of different line items stocked. To increase the stock range is to add new line items to stock. REAL TIME— The posting and processing of transactions as they occur rather than by the batch. RECONCILLATION— An effort between two or more activities, units, or work centers to bring a common file into agreement. RECOVERABILITY CODE— The third position of the maintenance code indicating the lowest level authorized to condemn and dispose of an item. REFERRAL ORDER— An order used between supply stock points, item managers, and other managers in the supply distribution system. Its purpose is to pass requisitions for continued supply action when the initial activity cannot fill the demand. REPAIRABLE ITEM— A component or item that can be returned to an RFI condition by use of repair parts or by overhaul. REPLACEMENT ITEM— A different item supplied as a spare or repair part in place of the original part. Replacement items are not necessarily interchangeable with the items they replace. REPORT OF DISCREPANCY (ROD)— Used to report shipping or packaging discrepancies attributable to the activity that shipped the material. This is reported on Standard Form 364, which is prepared by the receiving activity. REQUISITION STATUS FILE— A file that contains records used to record a history of incoming and outgoing status changes and other requisition actions, such as cancellations, modifications, and material obligation validations. AI-6