| 摘要 |
PROBLEM TO BE SOLVED: To provide a bidding method whose cost fluctuation on bidding cost is small in the same way as hand bidding and which can execute bidding at appropriate cost even in an automatic bidding system. SOLUTION: In a step S1, cost with base is displayed on the cost column of a display device from a central processing unit and bidding is started. In a step S2, the presence or absence of proposal is viewed. If it does not exist, a loop is made to a step S3 and unit cost is reduced from previous cost and bidding is continued. When proposal is given, a system proceeds to a step S4, a regular successful bidding processing is executed in a step S8 when the number of proposals does not satisfy the number of presentations. The loop is made to the step S3 and bidding is continued. When the number of proposals exceeds the number of presentations, the system proceeds to a step S5 and bidding is executed with smaller unit cost. When the number of proposals exceeds the number of presentations in a step S6, the loop is made to the step S5 and rise bidding is continued. When the number of proposals reduces and it becomes similar to the number of presentations or becomes less, the successful bidding processing is executed in a step S7. |
