Abstract
We propose a model of the traceability on the deliverables and works for managing the unexpected obstacle analysis in the upper process of embedded software development projects. In the projects of embedded software development, the project cycles are required to be shorten although the software has been becoming larger in scale and more complicated. In such a background, the quality of software specifications is one of the main concerns. Theredore, it is necessary to develop an analysis technique and project management method for unexpected obstacles. In this paper, we dicuss the model for managing the unexpected obstacles analysis and the future study.