Although a separate function of some kind is implicit in the very existence of a separate department, there may be, especially in manufacturing proce… - James D. Mooney

Cross-functionalism, however, cannot eliminate departmental organization; on the contrary the organized supervision of any function of this character becomes itself departmental. Thus out of cross-functionalism must grow cross-departmentalism. Cross-departmentalism is an extended application of the principle of horizontal correlation.

My own principal interest lies in the sphere of , which of all major forms of human organization is, in its present magnitude, the most modern. For this the reason is evident. The vast present-day units of industrial organization are products mainly of one creating factor, namely the technology of mass production, and this technology, born of the industrial revolution, has been almost exclusively an evolution of the last century. In contrast other major forms of human organization — the state, the church, the army — are as old as human history itself. Yet if we examine the structure of these forms of organization we shall find that, however diverse their purposes, the underlying principles of organization are ever the same.

The third and effectuating principle of the entire scalar process is Functional Definition.