Organisations are technical instruments; designed as means to definite goals... they are expendable. Institutions... may be partly engineered, but th… - Philip Selznick

An organization is a group of living human beings. The formal or official design for living never completely accounts for what the participants do. It is always supplemented by what is called the “informal structure,” which arises as the individual brings into play his own personality, his special problems and interests. Formal relations co-ordinate roles or specialized activities, not persons.

There seems to be little doubt that the factor of sheer size is a very important element in concrete bureaucratic structures. However, because of the patterns exhibited in the behavior of agents in small organized groups and because of the implications for greater generality, the formulation used here does not make the factor of size crucial for the existence of bureaucratic behavior patterns.

The most important thing about organizations is that, though they are tools, each nevertheless has a life of its own.