Abstract
CIM was introduced by MLIT in 2012. However, most of recent efforts for CIM are limited on the contractor side. Though, proactive activities of the owner are indispensable for improving productivity throughout the construction life cycle. In some cases, efforts to improve productivity by the owner have also begun. MLIT has devised the basic-frame as river management CIM. Therefore, with consid-ering the problem of CIM, this paper proposes the data retention as numerical data and improvement of basic-frame. Moreover, based on the proposal, the author considers the owner's CIM of future.
