Additionally, the application of instruments for measuring successfulness and functionality of information system in an organization has several implications for managerial process and development of information system. Every new information system manager must be trained to interpret the assessments of information system successfulness, which he receives trough periodical survey of all users, and also know how to develop strategies for solving problems revealed by users. Information system management must be included in those marks, to the level on which every one of them can use grades of user satisfaction for identifying areas of some problems, as well as to analyze grades of importance in order to assign priorities to activities of development or maintenance of information system.