The use of sampling models implies that the sociologist will be conceiving and acting on the empirical world in terms of certain specific rules. In sampling, a theoretically relevant set of events is located and enumerated. This may go no further then specifying a series of hypotheses from a theory, or it may involve the listing of all members of an organization or community. To maximize the possibilities of drawing a representative sample, randomization is employed. The basic assumption of randomization is that every element or some combination of elements, in the population has a specified chance of being included in the sample. Two basic types and models of sampling may be distinguished: noninteractive and interactive. Noninteractive models fail to establish directly patterns of relationship between natural social units. Interactive sampling models recognize the fact of interrelationship between natural units and attempt to reflect those patterns accurately and directly.