Efficient management of the organization, especially in threat and crisis conditions, implies the need to assess both the eff ectiveness and security of information systems, including computer information systems. Th eassessment of safety and eff ectiveness level of management support systems could become the base for determining the directions and methods of improving the management of any organization. Identifying the sources of threats and reductions in the system eff ectiveness can be an indication for the eff ective implementation of IT in the organization. In this article the author’s intention is to present a safety dilemma and the eff ectiveness of the management support information systems with particular emphasis on risk management project. Focus is made on the following issues: the notion of MSIS (Management Support Information Systems), the analysis of chosen IMIS (Integrated Management Information Systems), measures and models of system effectiveness assessment, MSIS security as the determinant of eff ectiveness, modeling the assessment of IMIS eff ectiveness. Proposed measures and model for measurement of the system features is therefore described.