One way in which systems thinking is executed is the way in which situations are explained by employees. Senge describes THREE LEVELS OF EXPLAINATION: a reactive explanation based on events (1), a responsive explanation based on behavior (2) and a generative explanation based on structural level (3). These three ways of explaining are linked to one another. A System (level 3) leads to a certain behaviors (level 2) which can lead to certain events (level 1). The best way to change events is therefore to change the system, which will lead to different behavior.