Study the functions and structure of management information system

Equipments of collecting and information transfer, electronic computer facilities have high cost: specific weight of costs of technical means in the general expenses on creation of the information management system makes to 60 - 70 %. Therefore improvement of maximum efficiency of the information management system requires creation of a technical complex at the minimum costs of its transformation, installation and operation that causes need of a choice of optimum option of technical means from among the possible. Definition of criteria of comparison and a choice of optimum option is an important problem of creation of complex technical providing the information management system. One of features of complex technical providing is its relative conservatism in comparison with other parts of the information management system (algorithms of functioning, regulatory base, functions of structural divisions, etc.) which develop and undergo essential changes in process of improvement of the information management system. The complex of technical means allows, as a rule, in the course of evolution of the information management system only quantitative changes, building, but not change of the general structure. In order that the information management system worked effectively, it has to built from calculation that can pass from 5 to 10 years after the system was for the first time offered. Thus, from that, the structure and parameters of complex technical providing is how successfully chosen, in essential degree survivability, efficiency and ability to evolution of the information management system in general depends. The aspiration to reduce terms of creation and introduction of the information management system results in need of shift of development of questions of complex technical providing on early design stages of the information management system and causes the iterative character of the solution of problems of complex technical providing consisting in consecutive specification of structure and parameters of complex technical providing at later development stages of system in process of specification and specification of other subsystems of the information management system.