A computer-implemented inventory management system for an enterprise which includes member stations having associated advertising inventory for sale, the inventory including segments of advertising time associated with future time periods. The system includes price forecasting program logic that generates a table of advertising time segments that meet customer request criteria, yield management program logic for generating/maintaining advertising time segment inventory pricing information for use by the price forecasting system in accordance with a pricing strategy, traffic billing program logic for generating confirmations of orders for inventory and for maintaining information relating to such orders, a network permitting access to time segment inventory pricing information for member stations, a system for accessing inventory information of stations in response to a customer request so that the time segment table includes inventory from member stations which meet such criteria and a system that reserves time segments likely to be wanted by an advertiser.