In modern times numerous researchers point to a undoubtable fact - the need for implementation of information management systems in organizations which want to keep up with time and technology development. Modern organizations trough implementing new technologies on the most optimal way adapt the existing system to its needs and adjust the organization of doing business on a way that allows them to keep the edge in front of others to stay competitive on all growing markets of search and demand of product and services. In regard of this facts successful implementation od information management system in organizations today more and more becomes a clear guideline - indicator of organizations success and a factor of survival on competitive markets on which rule the basic laws of nature as it was once written by the author (Darwin, 1859.) „Not the strongest members of one kind, nor the most intelligent ones, but those who best adapt to change - survive “. The importance of possession of information in the right moment and the accuracy of the given information affects the business on many levels as for example - decisions of managers rely on given information from the simplest decisions to the decisions on which depends the future of the organization. Komunalac d.o.o. now has an implemented information management system and the intention is to present, analyze the implemented system and to present the current state through the organization's maturity model (CMMI). Consequently, a visible contribution to this work is apparent, with the aim of showing potential guidelines for improving the existing system within the organization. Determining these guidelines will enable the improvement of the existing information management system, i.e. it will affect the accuracy of the information that is displayed through the system, thus affecting the improvement of the company's business, in which way the quality of the business and the quality of decision-making of managers will be improved, operating costs will be reduced and increase the profitability and utility of the organization will ocur.