In the systematic way, this paper considers various understandings and interpretations of the
concepts of organization, organizational structure and function, various modalities of organizational structures, and a special emphasis is put on a great number of defined functions as the key problem of the current functional model of organizing the Ministry of Defense and the Serbian Armed Forces.
Highlighting the problem of procedure and method of defining functions, that is the methodology of defining functions and their holders in the Ministry of Defense and the Serbian Armed Forces, and in search for new solutions in the establishment of their new organization, this paper proposes functions and their holders, which includes a substantial reduction in the number of functions that should lead to more optimized future organization of the Ministry of Defense and the Serbian Armed Forces and improvement of effectiveness and efficiency of the work of the mentioned institutions.
Grouping functions at the level of sectors has been offered as the basis for redefinition and organization of functions in the Ministry of Defense and the Serbian Armed Forces.