The hierarchy of information units and interactions in managing of Organizational Systems is ruther complicated. Interactions between departments of different levels of hierarchy are named “co-ordination” (Mesarovic, Mako, Takahara, 1970). This paper deals with the coordination as the “vertical” informational interfaces between the units called “elementary management cycles” which compose the structure of managing process.

The taxonomy of co-ordination processes presented in this paper is based on the decomposition of information processing at managing in so called the Space of Processes (Gudas, 1991).