Gulick accepted Weber's insights into the necessity of a hierarchical
structure, but he refined them further by developing additional intellectual
distinctions. In Gulick's view, an organization must be structured according to a core principle such as its purpose, process, clientele, or geographical place.This conceptualization has been influential in public administration
since it was first articulated in the 1930s and represented the apex of the Orthodox School. By carefully explicating"scientific"principles of bureaucracy, Gulick sought to reduce the ambiguity and partisan nature of government operations and place the discipline of public administration on firm foundation.