Material joint purchase system, material joint purchase method, and program for making a computer perform this method

A material joint purchase method being performed between terminals (2A, 2B and 2C) respectively possessed by a plurality of material purchasing companies and a server connected to each of the terminals (2A, 2B and 2C) through a network 3 and enabling the plurality of material purchasing companies to jointly purchase materials from material suppliers, comprising;

• a contract information collecting step (S17) of making a computer collect contract information related to material purchase contracts which each of the material purchasing companies has with said material suppliers,
• a contract information storing step (S20) of making a computer store the collected contract information according to the kind of material being a contract object,
• a contract information presenting step (S29) of making a computer present stored contract information to said terminal (2A, 2B or 2C) in response to material purchase offering information outputted from said terminal (2A, 2B or 2C),
• a contract selecting information receiving step (S31) of making a computer receive contract selecting information selected out of presented contract information, and
• a purchase offering information reporting step (S36) of making a computer report said purchase offering information to a terminal (2A, 2B or 2C) of a material purchasing company having a material purchase contract related to the received contract selection information.

A program for making a computer perform a material joint purchase method being performed between terminals (2A, 2B and 2C) respectively possessed by a plurality of material purchasing companies and a server connected to each of the terminals (2A, 2B and 2C) through a network 3 and enabling the plurality of material purchasing companies to jointly purchase materials from material suppliers, said program making the computer perform;

• a contract information collecting step (S17) of collecting contract information related to material purchase contracts which each of the material purchasing companies has with said material suppliers,
• a contract information storing step (S20) of storing the collected contract information according to the kind of material being a contract object,
• a contract information presenting step (S29) of presenting stored contract information to said terminal (2A, 2B or 2C) in response to material purchase offering information outputted from said terminal (2A, 2B or 2C),
• a contract selecting information receiving step (S31) of receiving contract selecting information selected out of presented contract information, and
• a purchase offering information reporting step (S36) of reporting said purchase offering information to a terminal (2A, 2B or 2C) of a material purchasing company having a material purchase contract related to the received contract selecting information.