ADJACENCY MATRICES AND SYSTEM DYNAMICS.

Using a graph and set-theoretic framework, this paper indicates how adjacency matrices for system dynamics models could be defined and used to facilitate construction of such models. The concept of an adjacency matrix is described first, and this is followed by definitions for each of the quantity types used in system dynamics. These definitions are then used to specify the nature of the interaction of the various quantity types. Using a subsystem approach, the adjacency matrix could be employed to specify the interactions within subsystems and then to specify the linkages between subsystems.