The buyer defines a start price, an end price (the best RFQ price), a price step, and a time interval. The e-auction can be set up as a multi-lined auction, where the above is defined per line.
Example: Start price ($85), end price ($100), price step ($1), and time interval (60 sec.). The auction will start at $85, and all suppliers will have 60 seconds to accept the price. If no supplier accepts $85, the price will then increase to $86, and all suppliers will have 60 seconds to accept this price, and so it continues. The first supplier to accept a price will close the line and thereby win the Dutch eAuction.
There is full commitment to the winner in a Dutch Auction as the buyer will only get the price from the winning supplier. The buyer does not know what prices the other suppliers could have accepted, only that they would be higher than the winning supplier's price.