A study concerned with a segment of the electronics- support cycle in Air Force logistics. An attempt is made to analyze the nature of the response-supply tradeoff for the depot-repair cycle to determine the proper mix of depot-maintenance effort and supply stocks and to achieve the most economical joint cost for a given level of support efficiency. The depot-repair cycle is defined as the time interval between the start of physical repair action and the shipping of the repaired item back into the supply system. While the analysis is limited to fire-control-support experience, the nature of the tradeoff studied applies to any depot-reparable item. The study demonstrates the importance of including the supply-cost implications of repair-cycle length as an explicit element in planning repair capability and as a criterion of depot performance.