With the rapid and continual flow of information in today's battle spaces, the volume, tempo, and uncertainty of incoming information in the command and control (C2) environment can overwhelm decision makers, particularly those in complex mission planning teams. This paper will discuss a decision support design intervention that aids in the formulation of recommended courses of action for a command staff. This includes the gathering of expert knowledge and opinions in order to provide a vehicle for team dialogue and negotiations for alternative solutions. The key focus is accurately capturing the experts' decision making processes via a computer interface, so that differing points of view can be shared and can eventually converge towards one recommended consensual course of action. This research investigates whether the proposed Probability and Ranking Input Matrix (PRIM) allows for efficient and clear user input as well as to promote understanding of variable relationships and their likelihood of occurrence.