Abstract: This article looks at the relationship between success, the role of personal and professional quality and the group, on the one hand, and the significance of a co-activity environment on the other. The final result, which in practice is the achieved objective, is heavily dependent on the components of a co-activity system. Furthermore, even if a high grade is awarded for personal and professional qualities and efficient group activity, the end result might deviate from the expected result to a certain extent. The reasons for this are to be found in a co-activity environment. It is a source of social activity because it can provoke actors to act in a variety of ways. Depending on which of its components have been activated, there may be prerequisites for active or passive behavior. The article also discusses the types of behavior which create an atmosphere of indefiniteness and characterise social activity in relation to co-activity environment and as behavioural dependency over time.