Abstract
As for risk management, due to importance of plan conversion and counter-measure examination at early stage of planning stage, various activities such as organizational activities and tool construction...etc, have been conducted. But, it is considered that methods about continuously monitoring risks are not so matured yet, when compared to those of planning stage. On the other hand, as the project is executed as a several series of activity process associated with WBS at project execution stage, it is appropriate that continuous monitoring of risks is conducted for each WBS. In this study, it reports about the case using the technique, which is a kind of risk monitoring method used at risk management stage, that is paying attention to WBS. This technique gives a simple way of sharing risk monitoring for each WBS and stake holder judgement, and "visualization of the project" is easily conducted with it accordingly.