Within this paper, an approach is presented for graphical illustration of triangularization algorithms. Thereby the benefit of representing complex content in a Design Structure Matrix (DSM) and a strength-based graph visualization can be combined. To assess this approach, a structure of interdependent project activities taken from a product development project is used as an example. In this context, the presented approach can be seen as superior to classical project planning methods such as Gantt charts based on top-down planning of project activities. Not being a supplement to classical methods, the presented approach is yet capable of reducing project risks and optimizing the sequence of project activities in order to avoid iterations through feedback loops and mitigate their negative effects. This methodological approach was applied in a software tool and verified.