complexitycomplexity - - Traditionally, the more data elements that are needed to describe (the parts and interdependencies in) a system the more complex the system is (defined as detail complexity). In theory of constraints as in the hard sciences, the more degrees of freedom a system has the more complex the system is (defined as conceptual complexity).
Example: Suppose you had the two systems portrayed as System A and System B. Which system is more complex? Most people would say System B since it has far more data points than System A. But if the four points in System A are independent and the arrows in System B are cause-and-effect arrows, then System B is the simpler system. In System A four points have to be changed in order to change the system but in System B, because the arrows are cause-and-effect relationships, only one point (the point with no incoming arrows) has to be changed to impact the whole system.