Competitive buying and selling system, its control method, and recording media having its control programs recorded thereon

Abstract

There is proposed a competitive buying and selling system that avoids unnatural bidding prices and exclusive possession of resources, stabilizes bidding prices, and provides such an environment that participants can bid easily. There are included a first step in which a server opens a subject of buying and selling and a successful bid evaluation function thereof to a plurality of clients, a second step in which each of the clients makes a participant determine the subject of buying and selling and a bidding price thereof by using the successful bid evaluation function, and notifies a determined result to the server, and a third step in which the server selects a bidding price of a participant who has indicated a highest evaluation value based on the successful bid evaluation function among all bidding prices notified from the clients and designates the participant as a successful bidder. The successful bid evaluation function is based on past bidding prices per unit volume and utilization efficiencies of resources knocked down in past. Furthermore, the successful bid evaluation function is based further on a resource occupation rate in bidding of this time.

1 - 8 . (Canceled)  
     
     
         9 . A control method of competitive buying and selling system, said control method comprising: 
 a first step in which a server sets a bidding flag assigned to each participant;    a second step in which said server opens a part of a subject of buying and selling to a plurality of clients;    a third step in which each of said clients makes a participant determine a part of said subject of buying and selling and a bidding price thereof, and notifies a determined result to said server;    a fourth step in which said server designates a person who has indicated a highest or lowest bidding price among participants each having a set bidding flag, as a successful bidder; and    a fifth step in which said server resets the bidding flag of the participant who has made a successful flag, wherein said second step to said fifth step are repeated.    
     
     
         10 . A control method of competitive buying and selling system according to  claim 9 , wherein if said participant who has made a successful bid has made a successful bid for at least a predetermined occupation factor of the bidding subject, the bidding flag of said participant who has made a successful bid is reset in said fifth step.  
     
     
         11 . A control method of competitive buying and selling system according to  claim 9 , wherein if said participant who has made a successful bid has made a successful bid for the bidding subject at least a predetermined number of times, the bidding flag of said participant who has made a successful bid is reset in said fifth step.  
     
     
         12 . A competitive buying and selling system comprising a server and clients, 
 said server comprising:    means for setting a bidding flag assigned to each participant, before bidding;    means for opening a part of a subject of buying and selling to a plurality of clients;    means for designating a person who has indicated a highest or lowest bidding price among participants each having a set bidding flag, as a successful bidder; and    means for resetting the bidding flag of the participant who has made a successful flag,    each of said clients comprising:    means for making a participant determine a part of said subject of buying and selling and a bidding price thereof, and notifying a determined result to said server.    
     
     
         13 . Recording media of competitive buying and selling system having a server side program and client side programs recorded thereon, 
 said server side program comprising:    a control program for setting a bidding flag assigned to each participant, before bidding;    a control program for opening a subject of buying and selling to a plurality of clients; and    a control program for designating a person who has indicated a highest or lowest bidding price among participants each having a set bidding flag, as a successful bidder; and    a control program for resetting the bidding flag of the participant who has made a successful flag,    each of said client side programs comprising:    a control program for making a participant determine a part of said subject of buying and selling and a bidding price thereof, and notifying a determined result to said server.