Decision theory (or the theory of choice) is a branch of applied probability theory and analytic philosophy concerned with the theory of making decisions based on assigning probabilities to various factors and assigning numerical consequences to the outcome.

the study of correct reasoning. It includes both formal and informal logic.

Source path and goal diagrams

interactions diagram

Flow charts

Concerning the study of direction

Concerning the study of reason , why , how

Concerning the study of Agents and their general relations

study of pathways

ACTION