An order data obtaining device displays a list of components on a Web page, and recognizes components selected on the Web page, thereby obtaining order data of a product that is formed of a plurality of components. A turnaround time display control device obtains turn-around time information of each of the components selected on the Web page, and displays on the Web page the longest turn-around time in the turn-around time information as a turn-around time of the product. An accurate turn-around time is calculated in accordance with the selection of components, and a customer is immediately notified of the accurate turn-around time of the product. Thus, loss of competitiveness in the market due to display of a turn-around time being fixed and too long because of its inclusion of leeway is prevented. In addition, since an accurate turn-around time notification is immediately provided to the customer, customer notification of the turn-around time and handling of queries over the phone regarding turn-around time can be reduced, thereby reducing management cost.