JustReason is a decision support tool, system that assist a user to reach a decision on a given topic. JustReason, use two method to do this:
The first is a decision tree to map out the path a user can take through the system at each node a user will be asked a question based on their answer they will then be taken down a different path until a conclusion is reached.
The Second is a argumentation graph, these can be attached to decision nodes where a user dose not have sufficient knowledge to adequately make the decision on their own.