Forward Auction: Shoppers bid on item; seller takes the highest offer.
Reverse Auction: bidders list product or service requirements and the max they will pay for it. Sellers reverse bid against each other by posting their bids. Bidder offering the requested products or services at the best price wins the bid.
Dutch Auctions: On electronic markets, the market operator displays a high opening price for an item and asks for buyers willing to pay the price. At prespecified intervals, the price is lowered until a bidder is willing to pay the displayed price.
Supply Chain Integration: synchronization of all parties involved in making a product or delivering a service in order to meet buyer, seller, and customer needs.
Efficient Consumer Response/Continuous Replenishment : Data and information on products are captured at the point of sale and shared with suppliers periodically (usually daily) so that both can work together to jointly forecast future demand for replenishable items, monitor trends, and detect opportunities for new items.
Horizontal Exchange : Seeks to simultaneously serve the interests of companies across different industries. Customers seek their services because of functional expertise rather than industry expertise.
Consortia-led Exchange: Industry players combine forces to create a common forum for the exchange of goods and services.