The concept of a boundary spanning role has been popular throughout academic research into innovation systems with over 48,000 peer-reviewed articles referencing the term since 1958. With the exception of closed systems, all systems have a transference across their boundaries and this process is facilitated by the boundary spanner. As models of innovation developed, the role of the boundary spanner remained key in seeking out and bringing new ideas into the system or sub-system. It should be noted that the role of the boundary spanner, is defined largely by where the boundary is drawn.