2024 Volume 80 Issue 1 Article ID: 23-00022
It was suggested that the form and terms of the contract for grant aid projects may have a greater impact on the discrepancy between the target price and bid price than the accuracy of the estimation standards adopted by JICA in grant aid project of Japan. Therefore, this paper focused on the differences between items stated in the contract clauses and actual conditions of work execution, which are assumed to be related to the discrepancy between the target price and the bid price, other than the accuracy of the cost estimation, and analyses the factors behind this discrepancy. As the result, following factors were identified: a lump-sum contract could not properly allocate the cost of managing risks, difficulty in confirming detailed construction plans at the bidding stage, and difference of the contract modification process between contractual provision and practical operation. It is important not only to improve the accuracy of target price, but also to reduce the risk of consultants and contractors by appropriate contract forms and terms.
